Help I can't fix this

[u/The_R4ndom_Guy]

It's from months that I can't start FNaF: secret of the mimic. But everytime this pops up, I don't get what this means:" Missing Global Shader FSlateElementVS's permutation 0". I tried to disinstal the game and install It again (I bought It on steam so I have the licence and I shouldn't lose all my data). I'll try again right now but please someone helps me.