Try changing the dimension id in the config for dimension id -19 and see if that fixes it as it might be that another mod is using that dimension id tooNow I got the crash with dimension -19 again... It looks like it happens if I generate a world leave it after a time and the secondtime I join it crashes on world load....
Here is the full log (9 MB ): https://www.dropbox.com/s/09xsjw48zp0z84x/fml-client-latest.log?dl=0