I'm experiencing problems on one of my sites running X.
I'm not able to view the media library - the files are there I just get a grey screen.
I also can't edit pages using WPBakery (VC) - I have deactivated plugins and ran various tests to see what could be happening, all to no avail.
I did get the following from a health check, which I reported to Heart Internet:
I'm getting lots of in wordpress problems and after investigation, it looks like they are all server related.
The REST API request failed due to an error.
Error:  cURL error 56: Failure when receiving data from the peer
The loopback request to your site failed, this means features relying on them are not currently working as
Error encountered: (0) cURL error 56: Failure when receiving data from the peer
Unfortunately, the error is occurring due to loop back connections not being allowed on the shared hosting platform which causes you the see cURL error the error.
I'm afraid these cannot be enabled for packages on a request basis.
These types of connections are not allowed on the shared hosting platform due to the possibility of a misconfigured script causing an infinite connection loop back to itself which will be detrimental for the platform as well as other users on it.
Most plugin and theme developer that use such loopback function has workarounds since these connections are not allowed on most shared hosting platforms.
Any help on this would be gratefully received - thank you