Modify NGINX Configuration File
sudo nano /etc/nginx/nginx.conf
Search for this variable: client_max_body_size. If you find it, just increase its size to 100M, for example. If it doesn’t exist, then you can add it inside and at the end of http
client_max_body_size 100M;
Restart nginx to apply the changes.
sudo service nginx restart
Modify PHP.ini File for Upload Limits
It’s not needed on all configurations, but you may also have to modify the PHP upload settings as well to ensure that nothing is going out of limit by php configurations.
If you are using PHP5-FPM use following command,
sudo nano /etc/php5/fpm/php.ini
If you are using PHP7.0-FPM use following command,
sudo nano /etc/php/7.0/fpm/php.ini
Now find following directives one by one
upload_max_filesize
post_max_size
and increase its limit to 100M, by default they are 8M and 2M.
upload_max_filesize = 100M
post_max_size = 100M
Finally save it and restart PHP.
PHP5-FPM users use this,
sudo service php5-fpm restart
PHP7.0-FPM users use this,
sudo service php7.0-fpm restart
It will work fine !!!