Sorry, No.
If I try my api key from mailchimp on a different page (with the same pagebuilder) it is still perfect working. Audience ID 3c3cb47d99 API: b7838b2db3b13d0aaeb8c0e482d92b20-us7
If I try the working api vice versa to using the other api on my side– it´s also not working on my side eventdrive.at.
So, there must be any problem in the pagebuilder itself.
I also tryed to give the full side to another provider for testing – same problem.
To try this you have to insert another IP into the host parameter from windows.
Mailchimp support says also that the api is working…..