Update MIXIN to 0.7.11
Please update 1.12.2 with MIXIN 0.7.11. Currently when attempting to use this for servers still on 1.12.2 (such as 2b) with a hack client it crashes due to MIXIN being too old in liteloader.
Deleting the "org" file from the jar and running offline allows everything to run and all mods to work, but if run online, it re-downloads and "corrects" the jar to have the old MIXIN.
I know this is old and unlikely to happen, but it seems like such an quick thing to fix, I've got my fingers crossed.