Visiting /admin/structure/salesforce/mappings/add produces an error:
Error: Call to a member function render() on string in Drupal\salesforce_mapping_ui\Form\SalesforceMappingFormCrudBase->Drupal\salesforce_mapping_ui\Form{closure}() (line 527 of /var/www/project-herbie/web/modules/contrib/salesforce/modules/salesforce_mapping_ui/src/Form/SalesforceMappingFormCrudBase.php).
Tracing that gets to how the "Component" label is set in unl_blocks_entity_type_alter().
Visiting /admin/structure/salesforce/mappings/add produces an error:
Error: Call to a member function render() on string in Drupal\salesforce_mapping_ui\Form\SalesforceMappingFormCrudBase->Drupal\salesforce_mapping_ui\Form{closure}() (line 527 of /var/www/project-herbie/web/modules/contrib/salesforce/modules/salesforce_mapping_ui/src/Form/SalesforceMappingFormCrudBase.php).
Tracing that gets to how the "Component" label is set in unl_blocks_entity_type_alter().