Game doesn't start anymore.

[Gravity]

Yesterday I was able to play the game, but since tomorrow morning not.
After I start Trials an error message appears:
"Anti Cheat Software not installed"
I aldry contact the Ubi Soft support, but no answer yet - great launch so far! -.-

[Pullè]

I'm having the same problem, but maybe you can fix it by trying something I've already tried:
Go in the folder " C:\Program Files (x86)\Steam\steamapps\common\Trials Rising\EasyAntiCheat" and launch as an admin the .exe, then try re-launching the game

[jdonnelly]

Try closing Uplay and try again.

[Gravity]

Seems there fixed something in the backend - it works now.
But thx for your help guys.

[Gravity]

All right - the issue is back and still NO answer from the Ubi Soft Support - great!

[Gravity]

Thx B-man, your solution worked!

[h.]

I had this problem and it had something to do with .NET framework 3.5
Open programs and features
Click Turn Windows Features On or Off
untick net framework 3.5
download and launch trials rising, it will install .NET framework 3.5 for you and then it should work