Hello,

I am not sure but guessing it’s due to client_max_body_size Please add ‘client_max_body_size xxM’ inside the http section in /etc/nginx/nginx.conf, where xx is the size (in megabytes) that you want to allow.

http {
    client_max_body_size 20M;         
}

If still same, try to update post_max_size & upload_max_filesize for your php configuration.

Thank you