@dbrown You can fix this in php-fpm config.

The path should be /etc/php-fpm.d/www.conf
Edit that file and towards the end of the file add these two lines:

php_admin_value[post_max_size] = 100M php_admin_value[upload_max_filesize] = 100M

Save and close the file then issue this command
sudo systemctl restart php-fpm
That will bump the max upload size of the files to 100MB