[Launch works, Worlds Don't]

I swear I'm not stupid, I'm just an audio learner. I need to hear someone say it and, in this case, show me. I wonder if the geek squad could help...?

[Launch works, Worlds Don't]

How? I click View Crash report but it doesnt show it.

I wish I could find some one to show me instead of tell me.....

[Launch works, Worlds Don't]

Hey, I need help. Minecraft keeps crashing with mods. Crash report follows:

The game crashed whilst exception in server tick loop Error: java.lang.VerifyError: Inconsistent stackmap frames at branch target 47

I got it to launch but now worlds won't load, only crash. HELP! It's driving me INSANE! I really want to play Minecraft and i want it to work before my channel launch.