Set options to an empty array if not an array

Closes #3491686

required_by_role.install

@@ -17,6 +17,10 @@ function required_by_role_update_8001(): void {
       continue;
     }
 
+    if (!is_array($third_party_settings['required_plugin_options'])) {
+      $third_party_settings['required_plugin_options'] = [];
+    }
+
     $options = $third_party_settings['required_plugin_options'];
     $options = array_filter($options);
     $options = array_values($options);