Webhook. Notifications to Teams from Qlik Sense

[EvaAral]

Hello everyone. I have created an incoming Webhook in a Microsoft teams' channel in which I want to receive notifications every time my Qlik Sense application is reloaded. The configuration gives me no problems, however, when I set up the new connection in Qlik and use the link generated above, I always get this problem:

Invalid webhook request - Empty payload

Would anyone know where the problem could be? Thank you very much.