Also never loading and getting CORS errors but not sure what preload is.
Failed to load https://node0.preload.ipfs.io/api/v0/refs?r=true&arg=QmccRaH...: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://vitriol.co' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.