The iCal URL for our troop is broken, returning 500 error. I regenerated, and also revoked and added anew, and still giving errors. Error confirmed on Apple Calendar and as well as Google Calendar.
Also, we are not seeing this error on our pack calendar from another account.
Unfortunately this appears to be an issue specific to your one account and will require TT staff to look into. I would suggest sending and e-mail to email@example.com, they are inundated with requests right now and are down a full time support person so things are moving slowly but they are getting to things as quickly as they can.