Thank you for reporting the issue. The error code 91 is different and is because of an issue with the Cryptlex license server which is a service that we use for our license manager.
I got in touch with them and they confirmed the outage and also confirmed that the issue has been resolved. Sorry about that.
https://status.cryptlex.com/780688531#logs
We should develop a backup option to ensure any possible issues in their services don’t affect our customers.