DOMException: "The expression cannot be converted to return the specified type."

- fetch: DOMException: "The operation was aborted. "
- XHR: TypeError: "Network request failed"
- fetch + Strea: DOMException: "The expression cannot be converted to return the specified type."

Workaround :

- Greasemonkey CORS script: https://github.com/azu/irodr/blob/master/resources/userScript/irodr-cors.js

Reproduce the reported fetch, XHR, and fetch-plus-Stream failures in the browser. Inspect the linked Greasemonkey CORS script for relevant request handling, but the issue does not identify an application file, test, or expected fix, so completion criteria still need to be established.

Written by the indexing model from the issue text.