##What's the issue?
Running amphtml-validator via command line returns

this.sandbox.amp.validator.categorizeError is not a function

How do we reproduce the issue?

1. install the latest amphtml-validator package from
2. run
   amphtml-validator file.html #this file is attached as file.zip in this ticket.
   file.html.zip
   returns:
   this.sandbox.amp.validator.categorizeError is not a function

What browsers are affected?

amphtml-validator via command line is affected