As noted in another open ticket, the Image route is inconsistently throwing a 401 error on the OPTIONS request preceding a POST request to the route. The route works sometimes, and not other times. There is no apparent pattern for why this occurs, as nothing in my implementation changes between when it works and when it does not.

The entire error reads:

Access to XMLHttpRequest at 'https://imgur-apiv3.p.mashape.com/3/image' from origin 'https://XXX.app' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

The headers the query is being made with are:

“X-Requested-With”: “”,
“Cache-Control”: “”,
authorization: "Client-ID " + XXX,
“X-Mashape-Key”: XXX,