Every trainer option works perfectly for me (on Uplay+), thanks CH! For those with issues, wait a few seconds after activating an option. Wait until you hear the "activated" voice or the little grey slider button on the trainer switch from grey to orange before you activate the next option. Took between 5-10 seconds per option for me.
I had every option except game speed and money/tech options active yesterday simultaneously for hours with no issue.
The game does lag a little when activating options, but that's not a problem at all.
I just updated my Nvidia drivers, it's still crashing for certain options like "Invisible" though.
Just waiting doesn't work for me as it instantly shows the "SystemOutOfMemoryException" error in the trainer, and crashes the game after a few seconds.
Stuff like Unlimited Health, GodMode etc works though.