Error: invalid event reference

I am getting the following error:

Error: An event was found with an invalid event reference. --- Event: Delayed Actions T-Stat Fan Mode (Delayed Action) - 4

At some point I renamed "T-Stat Fan Mode" to "Fan Mode" and also removed the delayed event.
Now I have a group called "Delayed Actions" in the events page that will not open/expand and it just times out.
I have removed all "delayed" actions from all events but I have no access to this new "Delayed Actions" group.

Any suggestions? I don't want to start over.