I wanted to play Agrarian skies 2 so I downloaded the curse launcher as usual. Then I installed Agrarian Skies 2. When I went to try and play, I got a error saying "Unable to start Minecraft Runtime Environment. This is most likely caused by a corruption. Please try to reinstall Minecraft.". What does this error mean and more importantly how do I fix it? I have tried uninstalling and reinstalling the pack.