Issue #3095133 by Berdir: Undefined index error is seen When installing...

Issue #3095133 by Berdir: Undefined index error is seen When installing Pathuato 1.6 beta1 on Drupal core 8.7.x

pathauto.module

@@ -179,7 +179,7 @@ function pathauto_pattern_validate($element, FormStateInterface $form_state) {
 function pathauto_local_tasks_alter(&$local_tasks) {
   if (version_compare(\Drupal::VERSION, '8.8', '<')) {
     foreach ($local_tasks as &$local_task) {
-      if ($local_task['provider'] === 'pathauto') {
+      if (isset($local_task['provider']) && $local_task['provider'] === 'pathauto') {
         $local_task['base_route'] = 'path.admin_overview';
       }
     }