You must update BKCommonLib as well! Please read the changelog carefully, some things may be important!

There is a change for the train chest permissions, instead of train.command.chest it is now:

• train.command.chest.use - for using the item
  
• train.command.chest.create - for modifying/creating/giving the item

Changes:

• [Fixed] Carts were disconnecting from each other sometimes due to floating point math bug
• [Fixed] Train animations reset weirdly when switching from looped to non-looped during the loop-to-front phase
• [Added] Trains with keep chunks loaded on will now automatically unload when derailed and moving a distance away from the origin of derailment
• [Added] When trains derail, /train info now shows where this happened exactly
  
• [Improved] The train chest command now has separate use/create perms, and a 'finite' mode, making it suitable for Survival use
• [Improved] Now uses lore tags rather than the display name for the train chest item states, such as empty
• [Added] Train selector condition 'derailed'
• [Fixed] Eject at sign was not respecting yaw/pitch angles
• [Added] A /train reroute --stop command - to stop rerouting if it impacts TPS too badly. Use with caution
• [Changed] Sneak-right-clicking with the debug destination stick will now only reroute direct neighbours of the switcher/destination sign first reached from where was clicked