[GNC] TSP Quote error in GnuCash

[j a]

When querying for TSP fund quotes within GnuCash, the following error is
produced:

"Quotes for the following commodities were unavailable or unusable:
* FUND:C Fund Finance::Quote reported failure with error: Fund not found"

The [online] quote source used in GnuCash is 'US Govt. Thrift Savings Plan'

The gnucash-cli command seems to retrieve quotes without any issues by
issuing the following command:
gnucash-cli -V --quotes dump TSP {C,F,S}

What are the steps to properly retrieve quotes within the GnuCash GUI?

J