I have had this problem for some time now, and though I can get Dorico up and running by doing some restarts + eLicinser maintenance, it is frustrating that I can’t trust Dorico to work every time.
To solve the problem, I usually do a restart, then open the eLicencer Control Center (version 184.108.40.2064) and click maintenance, wait for it to complete, then a restart, then open Dorico (220.127.116.112) again. Usually that gets Dorico up and running again. Sometimes I have experienced that I can skip the second restart, but you never know, so it is safest to restart twice, it seems.
My USB-eLicencer is the new type, I guess (short). I have seen that some with similar problem have been told to get a new (short) dongle. A while ago I ordered two new eLicencer control devices (dongles) in case I would have to use the “zero downtime trick”. Would it be smart for me to try to get rid of the old dongle and use one of the new ones anyway?
I would very much like to get help, please ask for information you need and I’ll try to give you precise answers.