I followed the installation guide but i get this error
GuzzleHttp\Exception\ClientException: Client error:POST https://onesignal.com/api/v1/notificationsresulted in a400 Bad Requestresponse: {"errors":["app_id not found. You may be missing a Content-Type: application/json header."]}
I followed the installation guide but i get this error
GuzzleHttp\Exception\ClientException: Client error:
POST https://onesignal.com/api/v1/notificationsresulted in a
400 Bad Requestresponse: {"errors":["app_id not found. You may be missing a Content-Type: application/json header."]}