I ran Saturday morning (14 April) and my activity appears in Garmin Connect. However, I am unable to edit anything: the activity name, activity type, etc. I can't add comments to it. Nothing. Any time I try to do something that modifies the activity, I get the message: "An error occurred saving the activity."
I have not run since then, so have not had an opportunity to try any other activities yet.
I seem to be able to edit activities that I ran prior to the 14th.
Behavior is the same on Chrome and Edge browsers (Windows 10).