I have had the same onedrive message asking for new password on my mac. I tried to disconnect the sync with no success. Reading this thread I come to the conclusion that it is better to change the cloud service, so I switched to icloud and sync seems to be fine. Of course this is not a solution to many other users.
I must say that the enpass support on the topic is not helpful. They just keep asking for more details and log-files while offering the same "solution" that never seemed to have worked for anyone. Sorry, but I am a paying customer for a mature product, not a beta-tester. If you don't have a solution yet then please say so and spare us the trouble of trying again and again.