When I try to play the game like odyssey I have to launch ubisoft connect launcher first then sign in. That's OK. Then I have to go back while ubisoft is still going and launch the game. I go thru the steamticker launcher ok then save and play with aurora exe. After that then the game crashes with the error Ubisoft Connect has detected an unrecoverable error and must shut down.”
So are these games bought on the ubisoft store or steam store? All games launch through the ubisoft connect app but it makes a big difference depending on where they were bought. Have you tried my solution in "Edit2"?
I did look at what version of proton. It was 8.3. I updated it but it doesn't go higher than 8.3
Restart your steam deck. If you don't restart then the version wont show up.
I followed the video but do not see Aurora running in the background.
Made sure to select Auror.exe and developer mode.
Any things I can try?
Did you check the FAQ? Link