Image Won't Go Wide Width Anymore

The only cache plug-in I have is Autoptimize, is that what you mean?

and W3 Total Cache

I do have this error showing up, I contacted support but they haven't replied...

FTP credentials don't allow to write to file /var/cache/wordpress-sources/5.7.1/.htaccess

W3 Total Cache Error: Files and directories could not be automatically created to complete the installation.

Please execute commands manually
or use FTP form to allow W3 Total Cache make it automatically

I'm kind of lost to be honest, off to make dinner just now, so may not be able to respond for some time.

There might be some conflicts between your cache plugins.

Unfortunately, we can't help with other plugins issues.

Hope they can fix it :)

Do you think it's W3 causing the issue then?

I'm not sure. You could try by clearing cache and disable all cache plugins, activate one at a time to test.