[Hidden-tech] Problems with AWS API and CORS

[Alan Frank]

Hi,

I am a newbie with AWS (learning it via acloudguru.com, where I posted 
my question a few days ago and have gotten no responses) and am running 
into problems with CORS; specifically, I am getting an error when my JS 
code attempts to call my API: "Access to XMLHttpRequest at 
'https://<redacted>.execute-api.us-east-1.amazonaws.com/default' from 
origin 'https://s3.amazonaws.com' has been blocked by CORS policy: No 
'Access-Control-Allow-Origin' header is present on the requested 
resource."

There is a huge amount of information out there, but most of it appears 
to be either irrelevant or over my head.  I did figure out that I might 
be able to look at an access log to see what is going on.  I found the 
instructions on setting this up 
(https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-logging.html#set-up-access-logging-using-console), 
but they tell me to "Sign in to the API Gateway console, select an API, 
choose Settings from the primary navigation panel, and enter an ARN in 
CloudWatch log role ARN."  However, this field does not seem to exist.  
I have provided this feedback to AWS, but am not expecting a timely 
response.

I'd be grateful for any help.

--Alan