Minecraft Dungeons Launcher tells me to fix it but an error message appears

In the Minecraft Dungeons Launcher it says that I have to fix the game What I do but then an error message comes up and I can't fix it I turned off my pc and turned it on again and then I had to completely reinstall the game because it was deleted I had to save the game to a different location This has already happened to me 3 times    (Sorry For Bad English)