Error, Mailpoet doesn’t work

Hi there,

I’ve installed Mailpoet on my website (currently unpublished), and I have everything set up properly. However, since a few days ago, Mailpoet and my news page have stopped working.

In the error log, I see multiple entries like this:

[2024-11-08T10:43:02.386035+00:00] mss.ERROR: key-validation.failed {"http_code":403,"home_url":"https://mywebsite.com","key_type":"premium"} {"free_plugin_version":"5.3.6","premium_plugin_version":"premium not installed"}

(I’ve replaced my website name here for privacy).

Could you please help me resolve this issue?

Thanks a lot in advance!

Best regards,
Antonio, from Spain.