The '%{detail/}' regular measure group cannot be created because it uses the '%{dimension/}' linked dimension, whose 'UnknownMember' ...

The '%{detail/}' regular measure group cannot be created because it uses the '%{dimension/}' linked dimension, whose 'UnknownMember' property is set to 'None'. A regular measure group can only use a linked dimension whose 'Unknown Member' property is set to either 'Hidden' or 'Visible'.