Premium plugin emails issue

Hello, we are experiencing issues with the Premium Plugin.
Since switching to the premium version of the plugin, every email inserted in the pop-up to spin the wheel doesn’t work. We receive an error message stating, “Sorry, this email is marked as spam now. Please enter another email to continue,” even with the WP admin email.

Additionally, the “White List” switch doesn’t function properly; after compiling a list and saving it, it reverts back to the “black list.”

Furthermore, if we switch back to the free plugin, the issue disappear, and all emails work again.

Can you assist with it as we need this to work ASAP

Thanks