2015-12-28 08:27:39: ERROR[Main]: Access denied. Reason: This server has experienced an internal error. You will now be disconnected.
2015-12-28 08:27:39: ERROR[Main]: ServerError: Lua: Runtime error from mod 'mob_miner' in callback luaentity_Step(): ...mals/worldmods/animals_modpack-2.5.0/mob_miner/utils.lua:49: attempt to perform arithmetic on field 'maxlevel' (a nil value)
2015-12-28 08:27:39: ERROR[Main]: stack traceback:
2015-12-28 08:27:39: ERROR[Main]:       ...mals/worldmods/animals_modpack-2.5.0/mob_miner/utils.lua:49: in function 'mob_miner_calc_digtime'
2015-12-28 08:27:39: ERROR[Main]:       ...imals/worldmods/animals_modpack-2.5.0/mob_miner/init.lua:234: in function 'update_digpos'
2015-12-28 08:27:39: ERROR[Main]:       ...imals/worldmods/animals_modpack-2.5.0/mob_miner/init.lua:320: in function 'custom_on_step_handler'
2015-12-28 08:27:39: ERROR[Main]:       ...ds/animals/worldmods/animals_modpack-2.5.0/mobf/init.lua:316: in function <...ds/animals/worldmods/animals_modpack-2.5.0/mobf/init.lua:314>
2015-12-28 08:27:39: ERROR[Main]:       ...ds/animals/worldmods/animals_modpack-2.5.0/mobf/mobf.lua:704: in function <...ds/animals/worldmods/animals_modpack-2.5.0/mobf/mobf.lua:610>