Expirienced same problem!
I experienced my problems with a fresh game with the DLC and having no mods activated, sadly it didn't work for me
It happens in new created games.
yea.. um, no it doesn't.
Do you own the new DLC Rise and fall?
if you do, then start trainer
start new game (PLAY NOW)
once you BEGIN GAME and can move your civs, ACTIVATE TRAINER
then use options
if the game crashes THEN, then you either have 1)wrong version (i.e. not legit steam version) 2) don't have latest trainer 3) something is blocking the trainer
I just tested it again and it's working. Others have it working as well..
Did you try the trainer after restarting steam just now? I recreated every step of yours with the newest trainer and after hearing "please wait" the trainer freezes.
I have the updated version on steam, the latest trainer and no firewall/ windows defender deactivated.
It must be a small dev update on the game you guys maybe dont have yet.