Fix Issue #3226792: Catch exception when trying to revoke client access

src/Form/GoogleApiClientRevokeForm.php

@@ -47,8 +47,17 @@ class GoogleApiClientRevokeForm extends ContentEntityConfirmFormBase {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $google_api_client = $this->entity;
     $service = \Drupal::service('google_api_client.client');
-    $service->setGoogleApiClient($google_api_client);
-    $service->googleClient->revokeToken();
+    
+    try {
+      $service->setGoogleApiClient($google_api_client);
+      $service->googleClient->revokeToken();
+    }
+    catch (\Exception $e) {
+      // In case the google client throws an exception, for example due to an
+      // expired token, we do not want to break the revoke form, as we will
+      // reset access token and authenticated anyways.
+    }
+
     $google_api_client->setAccessToken('');
     $google_api_client->setAuthenticated(FALSE);
     $google_api_client->save();