Hello, I copy what MailPoet plug-in support teamm says:
I installed a plugin to help test for conflicts and found it’s your theme.
Your theme loads a custom-admin.css file and applies additional css to all clearfix divs. When I remove that custom admin CSS, the buttons work.
I’d recommend removing it from wherever it’s added in your theme and then you can use MailPoet again. 🙂
Could you please implement this suggested change in my website webaucv.org ? Thank you!