"Updating Failed" Issue: Bug Identified

[spike3557]

I am using WordPress 5.1.1 and I had a problem with the "Updating Failed" error message on various pages on my site. I have traced the issue to the word "convert". For some reason, if the word "convert" is used anywhere on the page, the update fails. I can make any other edits I want, successfully, but that specific word produces a fail.

This bug happens consistently on this page:
​https://gmastronomy.com/links/
But it does not seem to occur on any other page, very strange.

[Otto42]

This sounds like it may be an issue better suited to the support forums, however, for completeness: Ask your hosting service if they have any code in place to block specific keywords from POST requests. It is possible they have an overactive filter which is seeing "convert" as the SQL convert command, and have thus blocked it in an attempt to prevent hacking attempts.

I have not seen it for this specific word, but I have seen similar for others, and in all cases, it's the host using a bad ruleset somewhere.

[pento]

As @Otto42 mentioned, this sounds like an overly broad firewall rule. Please contact your host to get it fixed.