Known issue - workaround at
https://lists.gnucash.org/pipermail/gnucash-user/2023-May/106878.html
A new version of Finance Quote was recently released which may have fixed
the error, not sure but you could try updating that first - details here
https://lists.gnucash.org/pipermail/gnucash-user/2023
Share price updates using Yahoo as JSON are not working for some reason. Is
anyone else having this problem? Tried to access the mailing list to see if
anyone else is having this problem but I keep on getting an authorisation
failure.
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gnucash-user