Server crash

[aerozoic]

2017-04-16 19:29:54: ACTION[Server]: MiaMia places node default:pine_wood at (16545,65,10143)
2017-04-16 19:29:54: ACTION[Server]: Stephanie0404 digs default:jungletree at (16616,8,10126)
2017-04-16 19:29:54: ACTION[Server]: MiaMia places node default:pine_wood at (16545,65,10142)
2017-04-16 19:29:56: ACTION[Server]: [skyblock] skyblock.spawn_player() Colantonio692
2017-04-16 19:29:56: ACTION[Server]: [skyblock] get_spawn() for Colantonio692 is unknown
2017-04-16 19:29:57: ACTION[Server]: Stephanie0404 digs default:jungletree at (16616,7,10127)
2017-04-16 19:29:57: ACTION[Server]: Stephanie0404 digs default:jungletree at (16615,7,10127)
2017-04-16 19:29:57: ACTION[Main]: [Ignore] Queue of type save emptied
2017-04-16 19:29:57: ACTION[Main]: [Ignore] Queues flushed
2017-04-16 19:29:57: ACTION[Main]: IRC: Disconnected.
2017-04-16 19:30:00: ERROR[Main]: ServerError: Lua: Runtime error from mod 'mysql_auth' in callback item_OnPlace(): ...tforfun_skyblock/mods/skyblock_levels/skyblock.feats.lua:427: attempt to index local 'n' (a nil value)
2017-04-16 19:30:00: ERROR[Main]: Stack Traceback
2017-04-16 19:30:00: ERROR[Main]: ===============
2017-04-16 19:30:00: ERROR[Main]: (2) Lua function 'bucket' at file '/home/quentinbd/mff-skyblock/bin/../games/minetestforfun_skyblock/mods/skyblock_levels/skyblock.feats.lua:427' (best guess)
2017-04-16 19:30:00: ERROR[Main]:   Local variables:
2017-04-16 19:30:00: ERROR[Main]:    itemstack = userdata: 0x649441f0
2017-04-16 19:30:00: ERROR[Main]:    user = userdata: 0x568cee08
2017-04-16 19:30:00: ERROR[Main]:    pointed_thing = table: 0x64944300  {type:node, above:table: 0x64943310, under:table: 0x649434a0}
2017-04-16 19:30:00: ERROR[Main]:    n = nil
2017-04-16 19:30:00: ERROR[Main]:    ndef = nil
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = table: 0x4c8347f0  {default:river_water_source:table: 0x4c834d18, default:water_source:table: 0x4c834a50, default:lava_source:table: 0x417a6d68, default:water_flowing:table: 0x4c834a50, default:lava_flowing:table: 0x417a6d68, default:rive
2017-04-16 19:30:00: ERROR[Main]: _water_flowing:table: 0x4c834d18}
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = boolean: false
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = table: 0x649434a0  {y:4, x:22306, z:14016}
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = string: "DEUTSCH-LNDER"
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = string: "DEUTSCH-LNDER"
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = boolean: false
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = number: 1
2017-04-16 19:30:00: ERROR[Main]:    (*temporary) = string: "attempt to index local 'n' (a nil value)"
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Server restarted at dimanche 16 avril 2017, 19:30:25 (UTC+0200)
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:large_orange_diamond: