AWS API Gateway : Execution failed due to configuration error: No match for output mapping and no default output mapping configured

I had the similar issue, got it resolved by adding the method response 200

There was an issue when saving the default integration response mapping which has been resolved. The bug caused requests to API methods that were saved incorrectly to return a 500 error, the CloudWatch logs should contain:

Execution failed due to configuration error: 
No match for output mapping and no default output mapping configured. 

Since the 'ENABLE CORS' saves the default integration response, this issue also appeared in your scenario.

For more information, please refer to the AWS forums entry: https://forums.aws.amazon.com/thread.jspa?threadID=221197&tstart=0

Best,

Jurgen

What worked for me:
1. In Api Gateway Console created OPTIONS method manually
2. In the Method Response section under created OPTIONS method added 200 OK
3. Selected Option method and enabled CORS from menu