Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error in rule 'elm_qe_getemployeedetails' at function a!queryEntity [line 2]: The data store entity does not exist, has been deleted, or yo

As the error suggests, it is not able to find the DS. It may be because of the access or it might not exists.
Check for the mapping in the constant and then try re-publishing the datstore. 

As the error suggests, it is not able to find the DS. It may be because of the access or it might not exists.
Check for the mapping in the constant and then try re-publishing the datstore.