Whenever someone registers for an event, this error displays instead of the thank you page:
I'm using Wordpress and I have a civicrm page, and I have the Wordpress base page set to the civicrm page on the CMS Database Integration page in civi. The url for the error page displayed is: ?page=CiviCRM&q=civicrm%2Fevent%2Fregister&_qf_ThankYou_display=true&qfKey=
I see the error below in the the civi debug log.
A thank you email is sent as requested. I'm usisng CiviCRM 5.4.1 and Wordpress 4.9.9.
What do I need to configure or change to fix this problem?
ETA: The thank-you page used to display properly. I think it stopped working when Wordpress was automatically updated to 4.9.9. Any ideas?
Update: We are using credit cards through Paypal Website Payments Pro for payments. The transactions go through and are marked as complete.
We also get this error when people register with a discount code giving them a free registration, thus no paypal transactions are required, or if they register using the pay later option. For donations and memberships, the orginal donation or membership screen is displayed instead of the thank you screen.
Update:
I finally found the correct debug log. We have a subsite and I was looking at the main site ConfigAndLog. Here's the error and backtrace:
Jan 07 11:01:08 [info] $Fatal Error Details = Array
(
[message] => Could not find valid value for id
[code] =>
)
Jan 07 11:01:08 [info] $backTrace = #0 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Core/Error.php(381): > CRM_Core_Error::backtrace("backTrace", TRUE)
#1 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Utils/Request.php(121): CRM_Core_Error::fatal("Could not find valid value for id")
#2 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Event/StateMachine/Registration.php(52): CRM_Utils_Request::retrieve("id", "Positive", Object(CRM_Event_Controller_Registration), TRUE)
#3 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Event/Controller/Registration.php(47): CRM_Event_StateMachine_Registration->__construct(Object(CRM_Event_Controller_Registration), TRUE)
#4 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(304): CRM_Event_Controller_Registration->__construct("Event Registration", TRUE, "null", NULL, "false")
#5 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(84): CRM_Core_Invoke::runItem((Array:15))
#6 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(52): CRM_Core_Invoke::_invoke((Array:3))
#7 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/civicrm.php(1246): CRM_Core_Invoke::invoke((Array:3))
#8 /var/www/vhosts/site/httpdocs/wp-content/plugins/civicrm/includes/civicrm.basepage.php(141): CiviCRM_For_WordPress->invoke()
#9 [internal function](): CiviCRM_For_WordPress_Basepage->basepage_handler(Object(WP))
#10 /var/www/vhosts/site/httpdocs/wp-includes/class-wp-hook.php(286): call_user_func_array((Array:2), (Array:1))
#11 /var/www/vhosts/site/httpdocs/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters("", (Array:1))
#12 /var/www/vhosts/site/httpdocs/wp-includes/plugin.php(515): WP_Hook->do_action((Array:1))
13 /var/www/vhosts/site/httpdocs/wp-includes/class-wp.php(728): do_action_ref_array("wp", (Array:1))
#14 /var/www/vhosts/site/httpdocs/wp-includes/functions.php(960): WP->main("")
#15 /var/www/vhosts/site/httpdocs/wp-blog-header.php(16): wp()
#16 /var/www/vhosts/site/httpdocs/index.php(17): require("/var/www/vhosts/site/httpdocs/wp-blog-header.php")
#17 {main}
