I was having an issue where KubeJS would crash the game when added to the mods folder. I posted incorrectly to KubeJS ( see KubeJS-Mods/KubeJS#268) where I was told it was not the same issue and to upgrade Rhino, so I tried the beta build of Rhino. Instead of crashing immediately, it crashes on the Mojang logo screen.

The game crashed whilst exception in server tick loop
Error: java.util.concurrent.CompletionException: net.minecraft.ReportedException: Accessing PalettedContainer from multiple threads
Exit Code: -1

Crash log: https://gist.github.com/isaaclepes/101552a456b1eff0ba5e03c4b7f63f88
Debug Log: https://gist.github.com/isaaclepes/cdf6d0e3df44628746735cf86484e5cd
latest log: https://gist.github.com/isaaclepes/e5f1396f653d1050afc1f24245dcbd73

If I remove kubejs and revert to Rhino build 94, the crashes stop.

Thanks. I also found an issue on their tracker that matches:
malte0811/FerriteCore#52

Closing issue ticket: The correlation was not causation, I was just able to reproduce the crash with build 94. Apparently it intermittently works, which gave the appearance it worked only when Rhino was on build 94.

For reference, this issue seems to be related to FerriteCore, and perhaps some bad interaction of FerriteCore with Refined Storage. Also, generally speaking, KubeJS should error out shortly after launch if the version of rhino is too low; I'm guessing that didn't happen this time because we forgot to update the mod info files