[GNC] AqBanking "Select a Bank" just hangs

[Carl Ponder]

I'm running GnuCash 5.13 on Ubuntu 24.04 using the command

    /usr/bin/flatpak run --branch=stable --arch=x86_64 --command=gnucash
    --file-forwarding org.gnucash.GnuCash @@ %f @@

and trying to automatically download the transactions from my checking 
account at Charles Schwab and VISA transactions from Bank of America.
Using the menu

    Apps -> Office -> GnuCash -> Accounts -> Charles Schwab -> Tools ->
    Online Banking Setup -> Start AqBanking Setup -> Create User ->
    Select a Bank

I get a pane where I can enter the name "Charles Schwab" or "Bank of 
America", but then it just hangs.
Also the letters show up slowly in the pane, it looks like it's trying 
to do a lookup as I type, but not getting anything.
This page here

    https://wiki.gnucash.org/wiki/Setting_up_OFXDirectConnect

mentions a https://www.ofxhome.com/  database, but as far as I can tell, 
this URL doesn't exist.
Does GnuCash actually support online banking?