project paypal error

Hi, I try at Tokyo.
tonight I bought fundingpress and tested.

project is
http://yuzuriha.co/cf/?project=test1&step=1

after click “commit to funding” then error.

Warning: error_log() expects parameter 2 to be long, string given in /usr/local/lib/php/Log/error_log.php on line 120

Warning: error_log() expects parameter 2 to be long, string given in /usr/local/lib/php/Log/error_log.php on line 120

Warning: error_log() expects parameter 2 to be long, string given in /usr/local/lib/php/Log/error_log.php on line 120

Fatal error: Call to undefined method XMLReader::readInnerXml() in /virtual/yuzuriha/public_html/yuzuriha.co/cf/wp-content/themes/funding_press/funding/lib/PayPal/SOAPEncoder/SOAPEncoder.php on line 116

project>PayPal API Credentials>mode is sandbox
and plugin
Easy Digital Downloads 2.2.2
Easy Digital Downloads 1.2.4
Easy Digital Downloads – Record Test Payments
are all off (all on then same result).