Your webserver does not serve `.mjs` files using the JavaScript MIME type. This will break some apps by preventing browsers from executing the JavaScript files. You should configure your webserver to serve `.mjs` files with either the `text/javascript` or `application/javascript` MIME type.
Edit /etc/nginx/mime.types
application/javascript js mjs;
Remove configuration in nginx conf
# include mime.types; # types { # text/javascript js mjs; # }