Caldav freezes saying "loading"

[theaddies]

I have 2 different Caldavs that I pull from the same server. One works fine the other always displays “loading …”. I have looked in the output from pms logs and I don’t see any errors relating to the calendar. It just says:
Calendar-fetcher: Broadcasting 64 events
I was wondering if there is anywhere else that I can look to find more errors that might explain what is happening. This has worked in the past and for some reason now it just won’t. I was thinking that perhaps there could be some character or entry in one of my calendar events that is causing an issue. But I don’t know where to go to find specific calendar errors. The mirror is running on a raspberry pi 3B

[sdetweil]

@theaddies there have been reports of the broadcast from the helper to the front end not being received
see https://github.com/MagicMirrorOrg/MagicMirror/issues/3380

as a test can you refresh the screen ctrl-r