After doing a git pull and then running npm install, it seems that two modules valid-url and request went missing (they were used by MMM-CalendarExt. I tried to navigate back to the MMM-CalendarExt module and run npm install there but that didn’t help. I had to go to the root directory for MM and actually run npm install request and npm install valid-url. Not sure if anyone else is exhibiting this, but I through id’ throw it out there.