TOM

The error suggests that you updated to 4.0.0, but didn't update the yaml configuration correctly. I'm running 2023.10.3 and ics_calendar 4.0.0, and I don't see the errors. If you can...

Hmm... Maybe I didn't test having no config at all... Anyway, it seems that you updated ics_calendar to v4, but didn't update the config at all. Please see [UpgradeTo4.0AndLater.md](https://github.com/franc6/ics_calendar/blob/releases/UpgradeTo4.0AndLater.md) for...

Thanks for the info. I'm keeping this open until I have a chance to give a useful error message. Besides, if you missed it, somebody else will miss it, too,...

v4.0.1 adds an error message with explanation, however, in my instance of HA, I couldn't reproduce the problem at all. I'm keeping this open for a while, in case someone...

The HA calendar no longer allows events without a title/summary. I could probably either ignore such an event, or put in a dummy title, like “no summary”. If people will...

Do you have an opinion on what to put in the summary? The requirement that it have something is from HA, but it's easy for me to put something in...

Thanks very much for the info. I’ll try to get to this next week, but no guarantees, this is a busy time of year for me. On Dec 5, 2023,...

Do your automations run simultaneously? Is a single automation allowed to run multiple times, simultaneously? How do your automations check calendar events? It seems possible that those automations are causing...

OK, I'm stumped. My best guess is that something with your automations is triggering (pun intended) a race condition in HA that's causing this. That is, multiple items are trying...

No problem on the delay, I don't always have much time to work on this project, especially when it falls under the category of "it works for me". ;) If...