When using Trailhead to 'Verify Step' such as verify fields, etc that are affected by namespace prefixes, then the verification fails with the following error even though all steps have been performed completely:

There was an unhandled exception. Please reference ID: LFCZHEFU. Error: Faraday::Error::ResourceNotFound. Message: NOT_FOUND: The requested resource does not exist 
Note: you may run into errors if you've skipped previous steps.

Hello Salesforce Community, 

I'm having an error with this challenge on Automating Time-based Actions with Workflow: Error Below

Challenge not yet complete... here's what's wrong: 
The 'Set Case to Escalated' Workflow field update action was not found.

Here are my screenshots for the criteria and the rule activation below:



Please Advise....Thanx