The mod Train tunnels caused a non-recoverable error.
Please report this error to the mod author.

Error while running event traintunnels::on_player_driving_changed_state (ID 26)
LuaPlayer doesn't contain key player.
stack traceback:
traintunnels/control.lua:452: in function 'findPlayerInMovers'
traintunnels/control.lua:969: in function <traintunnels/control.lua:939>
stack traceback:
[C]: in function 'index'
__traintunnels/control.lua:452: in function 'findPlayerInMovers'
traintunnels/control.lua:969: in function <traintunnels/control.lua:939>

Should be fixed in 0.0.5. Really need to set up my other instance for 0.17 so I can test multiplayer again :|