I have a custom Lambda function that I set up with API Gateway. When invoking the API gateway resource path with Postman the Lambda gets invoked and does what it should. I enabled CORS on the API Gateway and didn't forget to deploy.
On Cloudfront I set up API Gateway as origin. Also I set up a cache behavior that forwards the headers as you can see in the following screenshot.
The response when invoking the endpoint in Cloudfront is the following:
I also tried removing the Host header, which leads to the same error Code but "MissingAuthenticationToken" as error reason. Because I found in the internet, that CORS might be a reason for this, I also tried setting the CORS headers in the response of my Lambda function which also didn't help.
I'm out of ideas right now. Does anyone know how to help? I had nothing but trouble with Cloudfront so far.