Hi  ,
While verifying custom metadata type (from trailhead ) at Creating and Managing Custom Metadata Types step , I am getting below error 

There was an unhandled exception. Please reference ID: JSNBHPWZ. Error: Faraday::ClientError. Message: INVALID_TYPE: VAT_Rate__c, MasterLabel from VAT_Data__mdt ^ ERROR at Row:1:Column:43 sObject type 'VAT_Data__mdt' is not supported. If you are attempting to use a custom object, be sure to append the '__c' after the entity name. Please reference your WSDL or the describe call for the appropriate names.


 I have enabled namespace in my dev org. Is it because namespace is not added before field and object name in above error ?
But I have completed almost 22 badges where I have not come across such error.