Issue #3511455: Call to a member function render() on string.

Closes #3511455

modules/salesforce_mapping_ui/src/Form/SalesforceMappingFormCrudBase.php

@@ -524,7 +524,7 @@ abstract class SalesforceMappingFormCrudBase extends SalesforceMappingFormBase {
       $options[$info->id()] = $info->getLabel();
     }
     uasort($options, function ($a, $b) {
-      return strcmp($a->render(), $b->render());
+      return strcmp((string) $a, (string) $b);
     });
     return $options;
   }