Thank you for your reply!
I directly contacted my host. Know I’m having PHP version 7.3 and I also gained insight into the php.ini.
I have now the correct PHP version and tried both options from the knowledge base, but unfortunately still without success.
I would really like to use MailPoet 3, but in the meantime I really don’t know what else I could do.
Are there any ideas?
Thanks in advance!