since today in the morning, we have a little problem with an SMTP-IMAP Round Trip Sensor.
I have updated our PRTG to Version 18.104.22.1684 via the Update function in the Web GUI. After the successfully update, this sensor is red with the message "Connecting to IMAP Server: Command received in Invalid state"
There were no other changes in our environment. Restart and recreating this sensor did not help. I checked the credentials and if the prtgadmin user is locked and so on.
Any ideas what else I can try out?