@jip
It seems on further testing I was able to load into that map just fine with Ai Uveso and experienced no crashes, but that was when playing alone. Playing with my friend had issues, so it could be something on his end or something about connecting online to another person specifically.

And obligstory launched once via steam

c:\program files (x86)\thq\gas powered games\supreme commander - forged alliance\gamedata\ambience.scd

Looks like this file is missing ?

Please reinstall your game to c:\program files (x86)\thq\gas powered games\supreme commander - forged alliance\

Also delete ALL files inside this folder:

C:\ProgramData\FAForever\gamedata

Then try again.