java.lang.VerifyError: (class: GuiSelectMPWorld, method: e signature: (I)V) Inco
mpatible argument to function
at java.lang.Thread.run(Unknown Source)
Is this an incompatibility or Just an Error?
Can you backup or remove your servers.txt file from the resources directory and try again? I'm not sure how you're getting this error to be honest. I've updated my MC and I'm not getting any such errors. This is my first encounter with a java.lang.VerifyError and the interwebs suggest it could be related to the obfuscation. I've taken down the download link while I investigate and talk to the MCP folks.