Update src/Form/OpenIDConnectSettingsForm.php

Closes #3260981

src/Form/OpenIDConnectSettingsForm.php

@@ -196,7 +196,7 @@ class OpenIDConnectSettingsForm extends ConfigFormBase {
 
     foreach ($roles as $role_id => $role) {
       $default = '';
-      if (is_array($role_mappings[$role_id])) {
+      if (is_array($role_mappings)) {
         // Surround any mappings with spaces with double quotes.
         foreach ($role_mappings[$role_id] as $key => $mapping) {
           if (strpos($mapping, ' ') !== FALSE) {