:runClient crashes after FML Version Check

Works as designed
Issue description


Everytime, I start MCreator's Client Test,

it crashes after the FML Version Check.

Idk y this happens. Rly.


Crash log:


Issue comments

Did you manually change any registry names of mod elements?

I believe this crash is caused by a duplicated registry name

EnderPearlBush and EnderPearlCrystal have same registry name, at least these two.

Use this tool with caution!

You were warned in the registry name editor

Ok. I'll just changed the ID of EnderPearlCrystal to "ender_pearl_crystal_upper"