Metro Minecraft Hack Error?

I have done a lot of research on why it is saying this when i start up my MineCraft with metro, i have tried to uninstall java and looked it up on google restarted my MineCraft and many other things. This is what it says.

Error: Could not find or load main class net.minecraft.client.main.Main
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be
removed in a future release

Connor 11.07.2015

The 64-bit Server VM is fine. Every one gets that. Its the first part that worries me. Try clicking the "Report to Mojang" button. They might be able to fix with a patch.

riley 11.07.2015