Hello @Dave Swan,
Thank you for reaching out to the Community and telling us about your issue, though I am sorry to hear that you are experiencing this. If you haven't already, I suggest you try signing out of your data file completely and then signing back in to refresh the registration token for your Online Connected Services. However, I do recommend that you first save a backup file prior to performing these steps.
Keep in mind that the sign-in pop-up dialog may continuously keep popping back up throughout this process, in which case you will need to continue closing it each time it pops up until you reach the full sign-in screen. I hope this helps!
Thank you for coming back to update us and for sharing the troubleshooting steps that you took.
I am happy to hear that you were able to reach a resolution!
Please do not hesitate to reach out with any further questions or concerns.