Fix get user role

core/um-short-functions.php

@@ -1364,6 +1364,9 @@ function um_fetch_user( $user_id ) {
 				}
 
 				if( $data == 'role' ){
+					if( is_array( $value ) ){
+						$value = implode(",", $value );
+					}
 					return strtolower($value);
 				}