Error while posting to zapier hook

Hi there,

I am try to build a rest data resource that posts 2 variables to a zapier webhook. I keep getting a “Error: TypeError: Failed to fetch. Does the server allow CORS?status: undefined” error. At this point I tried everything.

Anyone knows how to fix this?

To clarify, please check these screenshots:
Screenshot 2021-06-29 at 15.12.12



Anyone did something with zapier webhooks before?

Is there nobody with experience in this?