In the first step when enabling customer portal, I received the following error message:

Validation Errors While Saving Record(s) There were custom validation error(s) encountered while saving the affected record(s). The first validation error encountered was "You can't enable or activate portals because your org has encrypted standard fields. Ask your Salesforce administrator about disabling encryption, or use a Community instead.".

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I did in a previous trailhead turn on encryption per the instructions.  Further, I have unchecked all the options for encryption under platform encryption. 

Does anyone know how I can get around this issue so I can complete the module?