Fatal error: Uncaught exception ‘Exception’ with message ‘Preapproval failed: The X-PAYPAL-APPLICATI

Having problema linking my paypal account in the funding settings, I am almost certain the settings are correct,

but i get this error when I try to process a donation in a Project, (http://www.kilometros.org)

Warning: error_log() expects parameter 2 to be long, string given in /usr/local/php-5.3.26/share/pear/Log/error_log.php on line 153

Warning: error_log() expects parameter 2 to be long, string given in /usr/local/php-5.3.26/share/pear/Log/error_log.php on line 153

Warning: error_log() expects parameter 2 to be long, string given in /usr/local/php-5.3.26/share/pear/Log/error_log.php on line 153

Fatal error: Uncaught exception ‘Exception’ with message ‘Preapproval failed: The X-PAYPAL-APPLICATION-ID header contains an invalid value’ in /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/wp-content/themes/funding_press/funding/paypal.php:100 Stack trace: #0 /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/wp-content/themes/funding_press/funding/funding.php(252): F_PayPal->get_auth_url(Object(WP_Post), Object(WP_Post), Object(WP_Post)) #1 [internal function]: F_Controller->action_template_redirect(”) #2 /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/wp-includes/plugin.php(406): call_user_func_array(Array, Array) #3 /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/wp-includes/template-loader.php(7): do_action(‘template_redire…’) #4 /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/wp-blog-header.php(16): require_once(‘/nfs/c06/h06/mn…’) #5 /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/index.php(17): require(‘/nfs/c06/h06/mn…’) #6 {main} thrown in /nfs/c06/h06/mnt/154663/domains/kilometros.org/html/wp-content/themes/funding_press/funding/paypal.php on line 100