This is due to file/folder permission. so drupal cant write twig tempory files.

This is due to trusted host configuration of the serveur. It can produce when you change the domain name or 'trusted_host_patterns'. To resolve the probleme, add your new domain to the DRUPAL_ROOT/sites/SITE_FOLDER/settings.php (Ex: sites/defaults/settings.php)

To set configuration at the module installation

Exemple:
$site_name = \Drupal::config('system.site')->get('name');
// Set the site name.
\Drupal::configFactory()->getEditable('system.site')->set('name', 'My site')->save();

You can do that using Symfony JsonResponse.

Exemple 1.
return new \Symfony\Component\HttpFoundation\JsonResponse($array);