Hello,
I have the same issue on several website installed in multisite.
Error message while updating posts :
Updating failed. The response is not a valid JSON response.
And error in the health site check up :
The REST API did not behave correctly
The REST API did not process the context query parameter correctly.
I have tried everything I could do and understand, the permalink update doesn’t work, in does work in Plain but that’s not a real fix, same with the classic block editor works but as the website have been created with Elementor, it can’t be the solution. I actually can’t open Elementor editor either because of this bug.
I don’t have cloudflare and don’t really understand how to edit wp-json/v2/ nor apache config, not sure I can access it.
My wordpress version is 5.5.1 and my server provider is OVH. I have SSL enabled.
The last website I’m trying to edit is https://olivierherter.be
I’ve tried disabling the plugins but no change,
I’ve tried this in htaccess but couldn’t access my site anymore so returned to normal :
SecFilterEngine Off
SecFilterScanPOST Off
Anyone could help me out ? I’m getting desperate !
Thanks a lot !
