I have a website for a client which I have been working on and off for the last year and a half and today I get an email saying they cannot save any text typed into the content editor block and each time they try, they get an error message that spouts gibberish.

I asked them to copy paste the entire error to me using the inspector tool or similar and what I got back is quite odd.

It seems that when the editor tries to save anything it just lists the error as all the content from the index page. The error is literately the mark-up from the index page.

I did some research and I found this page
https://www.concrete5.org/community/forums/usage/unable-to-save-afte...
however disabling pretty URLs didn't help as the error persists.

The version of Concrete5 I'm running is 5.7.3.1

If anyone has any ideas it would be great as this is quite a big problem because currently my client cannot add any pages to their site.

Edit:
So it looks like this is not just redactor.. I created my own block with CKEditor and on submit it receives the same gibberish error. It worked on local testing so now I think something has happened to the webserver.

Edit 2:
Updating to 5.7.4.2 solved my problem.