If like me you use php-fpm with nginx and you ramp up the upload file size in the fpm configuration, you will also need to remember to put a line into your nginx configuration file.

I prefer to add this on a per-vhost basis but you can add it to theĀ http section of theĀ nginx.conf file:

client_max_body_size 256m;

If you change the 256m to whatever value is set as your upload_max_filesize and restart nginx you will be good to go.