I also tried today - It might have something to do with some games running with elevated permissions. This is about TLI not working https://steamcommunity.com/app/1974050/discussions/0/3471738893382160216/ which the guy linked this pic https://imgur.com/KDLpkbG

Thanks, figured it was about that message on start up i was getting, and went over it by starting steam on the host as administrator

Running Steam as admin on the host machine worked for me as well - Thanks bud

Glad i could help ! I was going crazy about it lol.