I have the same problem. When I try the settings you outlined above, with the
trailing space in the user name or without, I get the exact same log
messages (except the IP in my log is 23.205.73.7). GnuCash 3.5, AqBanking
v5.7.8.0stable.
When I inspect the /tmp/ofx.log file, I only see the request
There was a "[GNC] AqBanking help for Citi CC" thread last October about
getting the City CC working with AqBanking. It seemed that the key was to
add a trailing space to the User ID. Specifically, the following settings
were reported to function properly by Jim Maki:
AqBanking Setup
==> User