[GNC] Yahoo json unauthorized

[Ruaraidh Sackville Hamilton]

I recently had to change to "Yahoo as JSON" quotes when
Alphavantage changed their access rules, and for a while it worked no
problem. Today it doesn't. For each security I get an error message of the
form " ... Attempt to fetch the URL
https://query1.finance.yahoo.com/v7/finance/quote?symbols=[...] resulted in
HTTP response 401 (Unauthorized)".

Can anyone suggest a solution?

Ruaraidh