reduce error popups for unexpected errors (#637)

- temporary fix; will revisit as part of an overall error handling overhaul

src/app/services/error/error.service.ts

@@ -36,7 +36,7 @@ export class ErrorService implements ErrorHandler {
           'The Identity Server could not be reached for user authentication.'
         );
       } else {
-        messageService.displayMessage('Error', err.rejection.message);
+        console.log(err.rejection.message);
       }
     } else {
       console.log(err);