Paypal server 500

when I click on donate in step 2 I enabled the wp_debug and returned me the following errors:

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::isValidName() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1000

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Deprecated: Non-static method XML_Util::replaceEntities() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 664

Deprecated: Non-static method XML_Util::createTagFromArray() should not be called statically, assuming $this from incompatible context in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Serializer.php on line 1236

Deprecated: Non-static method XML_Util::attributesToString() should not be called statically, assuming $this from incompatible context in /usr/share/php/XML/Util.php on line 652

Strict Standards: Non-static method Log::singleton() should not be called statically in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/CallerServices.php on line 184

Strict Standards: Non-static method Log::factory() should not be called statically in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Log.php on line 200

Fatal error: Cannot access protected property Error::$message in /var/www/html/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Unserializer.php on line 826