GoCMS - a long shot for you detectives

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So I know nobody supports this stack anymore but I’m hoping someone will be able to take a look at this error message and advise me as to whether it looks like an issue with the stack or a server side issue.

The stack is GoCMS from Nick Cates, then Yabadab, then - I think - nobody.
The hosting company was Chillidog but is now whoever has taken over from them.

I get this error message whenever I try and save a change in GoCMS. Needless to say I’ve changed nothing my side since I last used this stack successfully.

Screenshot 2026-02-24 at 20.48.49
Screenshot 2026-02-24 at 20.48.49318×391 42.9 KB

Stack issue? Or a hosting issue?

Any advice gratefully received.

Rob

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All the Yabadab stacks were bought by Joe Workman last year including GoCMS. I don’t think Joe was going to support it despite it being a great stack as it competes with his TotalCMS stacks. Shame really, I have the stack and was wondering if it still worked!

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Server side. Either a PHP error because of a new version, or introduced cross site scripting checks by the hoster.

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Thanks a lot Jannis. Gives me somewhere to start.

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