Hello Joesi,
We never received your site credentials thus we never looked into this, however, rest assured free license can never expire as its technically not possible, it may be possible that as premium trial is expired or you might not have completed OTP verification of your license it is showing you some error which is looking like expiry. If you provide your credentials I will look and fix this.
We do not save any site credentials because it is risky for the client and not a good idea to save cPanel credential in a flat/encrypted database.
We always encourage users to send us DM or email and once the issue is resolved to change the credential.
-Abhishek
Team sellacious