ANKI Sync Error - A network error occurred. Error details: ⁨error sending request for url ()⁩

Ah ok, so

A network error occurred.
Error details: error sending request for url ()

is actually the full error.

There is an older thread on this that suggest the problem to be proxy settings:

I guess you considered proxy settings already? If not please check those too. Otherwise, I don’t have any ideas either. The problem must be some kind of connection blocker somewhere between your computer and the AnkiWeb server.

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