By default the maximum file upload size is set to 2MB.  It is not a Drupal issue, instead a php issue as upload_max_filesize is set in your php configuration (php.ini file).  Therefore it is a server-side configuration. If you have access to the php configuration file, I would recommend to make the changes directly in it.  Yet, on some occasions you cannot access the server configuration (on a shared hosting, for instance) and if you wish to alter some of your server...

Finding the issue with a server 500 error The Nginx error logs are showing too much detail.   Nginx logs and test There are no errors in the nginx log and sudo nginx -t looks fine sudo nginx -tResponse nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful  Are the services running? I'll start by doing a status check for  Nginx PostgreSQL jetty9 Supervisor Nginx sudo service nginx statusResponse ●...