Hey
Thanks for reporting this issue. Our developers are already aware of this and we’ll probably do a new MailPoet release tomorrow to fix this issue.
In the meantime, you can roll back the free MailPoet version by:
– using the WP Rollback plugin (https://www.ads-software.com/plugins/wp-rollback/);
or
– downloading the previous version here: https://www.ads-software.com/plugins/mailpoet/advanced/ (scroll down to ADVANCED OPTIONS section) and installing it via FTP: https://kb.mailpoet.com/article/258-re-installing-updating-the-plugin-via-ftp.
If you also use our Premium extension, you can download the previous version via the following link: https://release.mailpoet.com/downloads/mailpoet-premium/<API KEY HERE>/3.70.0/mailpoet-premium.zip
Please paste your MailPoet key instead of <API KEY HERE> and the desired version instead of 3.70.0.
I hope this helps and please review the plugin page tomorrow to see if there is already a new release available.
Cheers!