"dirty assets could not be saved" SOLUTION! Fortnite UEFE

i followed those steps and now i can’t enable my unreal revision control again, it says that the “unreal revision control binary is missing on my system” or something like that, my error message is in french
i tried verifying uefn files and opening it again, still no access to the revision control
edit : now i can’t launch my uefn and it ask me to do “reparation” wich is pretty much files verification but it always fail, what should i do ?
i tried re-installing the entire uefn and the installation keep failing