In one of the versions of Mongol, I may have accidentally commented out the debugOnly paramater. Just to be safe, I recommend removing it, reinstalling it, and redeploying. I checked all the other packages to make sure it was the only occurrence, and I’ll take extra steps to prevent it moving forward. If you are using Meteor Toys, you shouldn’t be affected, but it’d be worth updating anyways.
Apologies for the inconvenience.