I am currently trying to configure an event hook to synchronize users. I created a servlet in our application which accepts POST and GET where the GET request is the verification.
I created the hook and the verification worked but the delivery of the events always fails.
Connecting with other clients works fine. Are there more steps to debug?
Edit: I already tried what was suggested in Webhook POST fails but endpoint was successfully verified
All certificates are installed in the truststore on the Nginx server