Please enable debugging mode in WordPress. Here is how:
https://codex.wordpress.org/Debugging_in_WordPress
Also, check the memory limit in php.ini, this is a common cause of this issue...
Wow! Are you any closer to a release date yet? When Onyx is released, what will it cost me to upgrade? I am SOOOOOO loving this! Ya'll have revolutionized Plesk!
I need to to increase the php upload limit. I tried to uodate the php.ini to 1024m, but still in WordPress, I can only upload a maximum file size of 16mb. Why are the changes in my php.ini not actually working???