The last year nightly builds don't run on Windows XP, I had to review the source code of version 10.05 to get this issue fixed and running.
As far as the implementation of "UserArguments", in the 20.03 source code it depended of "GetActiveConfigEx().GetUserArguments()" (debuggergdb.cpp).
"GetActiveConfigEx()" returns a call to "GetActiveConfig()" which I could not find its implementation anywhere, so, I suspect that method was not implemented in the 20.03 source code.
I cannot find the source code of the revision you mentioned so I could not verify if this issue is really solved.
Just minutes ago I downloaded the yesterday revision of version 23.03 and I couldn't do a debugging test because it crashed when I tried to set a breakpoint; this attempt was on Windows 10.
Regards.