I fixed it by increasing client_max_body_size in /etc/nginx.conf to something more sane: client_max_body_size 16M;
I’ve got client_max_body_size 100M;
This started after I switched to PHP 7.4
Also, I’m seeing that others have this issue when running with PHP 7.3, and fixing by switching to PHP 7.2. While I’m doing PHP 7.4 -> PHP 7.3.
I don’t have any theories, as I’m not sure what’s going on. Just figured I’d pitch in with my solution and what I’m noticing.