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21:34:40: ERROR[main]: ServerError: LuaError: error: ...\bin\..\games\minetest_game\mods\inventory_plus\init.lua:72: bad argument #1 to 'pairs' (table expected, got nil)
21:34:40: ERROR[main]: stack traceback:

Any idea guys?

Thats a bug in the inventory_plus mod, post it in the topic for the mod.