Hi,
I have created a custom connector with the webhook trigger option:

And the reqeust:

Callback URL is inserted:

Well that is all fine.
When I test the custom connector everything is ok and the webhook is registered. I can see is also with Postman.
If I delete it and try to create a flow for it and save it. Is doesn't work:

The webhook isn't created 😞

Do I something wrong?
The callback URL is OK:
