Hi,
I have the same problem, when i activate the plugin my frontend page is blank. I am using the flatsome theme with PHP 7.4 and MariaDB 10.3.
Do you managed to figure something out? How to make compatible the plugins?
In the free version you can create 1 custom email in the premium as many as you want. The custom email is in the Emails & Misc section and under the Custom email Module.