Greetings NullMaster, the new versions published are not working, initially I tried the Premium version 3.0.83 published by the user purity, along with the free plugin in the Wordpress repository in its current version 3.46.13, it did not work.
Then I also tried the combination you posted yourself on Apr 29: Mailpoet installable 3.46.12 (Nulled) + MailPoet Premium 3.0.83 -new update, also not working.
In both combinations I see the limit of 1,000 subscribers and it does not allow me to send any email.
Sorry, don't take screenshots while viewing the error, I have already installed and tested the combination you posted on Apr 12, Mailpoet v3.46.08 along with Mailpoet Premium v3.0.83, and that has worked perfectly.
If the latest versions work correctly for you? If you can't recreate the error on your part and you need the screenshots, let me know to uninstall the current version that I have installed and reinstall the new version again so you can see the problem.