Invalid installation

i cant use my steam version of Borderlands TPS as infinity says its a invalid installation, does anyone know a fix?

If it’s a legit steam version something like this shouldn’t happen.
Maybe you are picking the wrong folder?

I picked the filder where the .exe is,but i didnt see the .exe while picking the foder manually

Yeah that’s normal that you can’t see it. You’re picking a folder not a file hence you can’t see the .exe.
Try picking the root folder
@STN you’re the author. What’s the folder structure?

The exe’s tend to be in the first folder found in C:\Program Files (x86)\Steam\steamapps\common

Binaries\Win32\BorderlandsPreSequel.exe

You are supposed to pick the base game folder

I did picked it but i reinstalled bltps and now it works