I'm using Wordpress 4.9.9 and CiviCRM 5.4.1. Earlier today I updated several plugins, everything works fine except Civi.

** UPDATE: With civi activated, I get a blank page any time I try to edit a Wordpress page.

I also get a blank page when I try to go to the Civi dashboard in Wordpress and I cannot access any Civi pages such as event registration or membership pages.

In a Wordpress log I get:

2019-02-14T22:19:10+00:00 CRITICAL Uncaught CRM_Core_Exception: [0: Invalid 
cache key: Not a string

thrown in /var/www/vhosts/<site>/httpdocs/wp- 
content/plugins/civicrm/civicrm/CRM/Utils/Cache.php on line 236

That code is in the assertValidKey function.

Any ideas on where to go from here?

  • Is this reproducible? If so, can you log what the cache key is at that point in the script? Feb 19 '19 at 13:54
  • How was this issue fixed ? I have upgraded recently to 5.15.1 but it shows me error as well and site is down due to this
    – harshal
    Jul 28 '19 at 17:40

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