posit.cloud - free tier account no longer working while not having exceeding any of the quota thresholds

I am receiving the following error message and cannot figure out what I failed to do or am supposed to do in the free tier. None of the limits re max number of projects, current month hours, etc are violated.
Thanks for pointing me in the right direction.
Servus,
RQ

message on posit.cloud:

Open Project

Your account has reached the limit for this operation.

To continue, upgrade your account.