Calendar app not able to add subscription to "on my mac" How do I get apple calendar to add calendar subscriptions to my greyed out "On My Mac" section?

I am not able to add calendar subscriptions to my "on my mac" subscription section, instead I am forced to put all subscriptions into the iCloud section (greyed out "On My Mac" section). Earlier I was able to do this without problems.
In Calendar->Preferences->Acccounts, disable iCloud.

Then create a new calendar, giving it a name that doesn't conflict with any of the calendars in your iCloud.

Now you can re-enable the iCloud account.

The new calendar (under "On My Mac") remains.