Please see why I did not receive an email for the Cloak of Adventure?  I have the Badge of Wisdom, received the email after getting that, filled out the form, earned 5 more badges..  still no email.  Please help me?

 

I am getting below error while doing trail head
Step not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.EmailException: SendEmail failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Either the plain text body or html body must be supplied.: [] 
Note: you may run into errors if you've skipped previous steps.

I am getting below error while doing trail head
Step not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.EmailException: SendEmail failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Either the plain text body or html body must be supplied.: [] 
Note: you may run into errors if you've skipped previous steps.