my game won't launch

I installed 2 mods today, I want to try it and the game does not want to launch. it appears in the taskbar, but when I click on it it does not happen

 

Have you done a Game Integrity verification check on Steam?

 

I did it in the support tools, and they tell me this:

--- Post updated ---
I did it in the support tools, and they tell me this:

 

Do the integrity check with Steam, the launcher one sucks and will never recover your files.

 

How do it ?

 

Right click the game in your steam library list, click "Properties" and it will open a menu. On the left hand column, you'll see a tab called "Installed Files". Click that, then click "Verify integrity of game files" on the right hand side.

 

i do it, but steam say : we install the good files, but they did nothing