Just found a solution to this.   In Salesforce Setup:  SchemaSettings>>ManageListCustomSettings>>Enable List as a Setting Type Option should be enabled.

Thanks

Thanks for reporting the solution.  I’ll explore whether this has been a change in the SFCD configuration,  or a change on our end.  We’ve always supported the use of custom metadata,  but should document if this particular setting needs to be enabled in order to use the metadata in picklist values in skuid. 

I have made the change recommended by Ann.  My picklist is still empty.