Happy to help! We’ll look into adding this into our documentation as well. Check out these posts and let me know if they help:
- Adminer : how to increase the 'post_max_size in the Php confi? - #4 by michael
- Oxygen Builder - Fatal Error Out of Memory - #2 by michael
- Php configuration - #2 by michael
In the posts above, they have require that the php.ini file is edited to increase the upload size.