App Builder Action 500 error

[gbaweja]

I have added a new action on app builder where my new action is called "external-api". My this action is just hitting a url with a header value but when I am trying to make a call I am getting a 500 error on my project runtime stage environment. I am not sure what I am missing or I need to configure something I am not sure.

This is the error:

time: 711 ms
failed request to 'https://{number}-{appName}-stage.adobeioruntime.net/api/v1/web/myFirstApp/external-api' with status: 500 and message: {
  "error": "server error"
}