[Mark.B]

Originally Posted by iref2010

update to 5.2.5?? no ways. you don't know what our tech team has gone through in this 5.2.2 vb upgrade.
recently, a patch released by vbulletin promised to fix security_token_guest 500 error. we did applied that patch but issue still persist.

Errors mentioned in the thread are difficult to reproduce on our end but our live error logs are filled with those errors.

Please let me know how can we fix it. these errors are faced by many vbulletin users.

Official support cannot be provided for obsolete versions. If you're advised to upgrade to help fix an issue, but you say "no ways I'm not upgrading", then that means the issue can't be fixed for you. There are lots of bug fixes in each release, it's very unlikely anyone's going to go hunting down your issue until you're running the latest release.

Sorry but that is the reality of it.

The guest token issue you mention is not happening on default 5.2.5 installations. I don't recall a patch being released for that specific issue, it may have been resolved in a full release - it's important to understand the difference between patches and full releases, otherwise you will tie yourself in knots.