Webhooks not working in Arduino IOT Cloud

Does anyone have experience with webhooks on a nano 33 IOT? When I try to add one in the Arduino IOT cloud, the button is greyed out.

Did you work according to the procedure given here?

Thank you. Yes I did along with a different official Arduino doc. It just won't seem to work.

I received a reply from Arduino. The reason it didn't work is that the link was incorrect. It had a /json folder in the path. It needs to be in the form shown below.
https://maker.ifttt.com/trigger/message/with/key/c0Gr85wCvjv4vQ3NQqOSIK