IFTTT returns 404

I remixed the below project (just with different variables) to make a IFTTT app with webhooks.
https://project-name.glitch.me/
However, IFTTT keeps telling me that it can’t connect to glitch/server and gives me a 404 error.
When I checked with curl, this is what I got:

curl -X POST -H “Content-Type: application/json” https://glitch.com/~clear-pyramid

Error
Cannot POST /~clear-pyramid

In the setup.md of the original file, there was nothing mentioned to setup a webhook except to type in the URL; what am I missing here?

You need to use the url https://clear-pyramid.glitch.me

used my url, still not working…

When I ran curl -X POST -H "Content-Type: application/json" https://clear-pyramid.glitch.me it ran fine and didn’t return any errors (there was no output).

huh somehow it works on mine now too…
I don’t know what was wrong then :confused: