Happening since I've hit level 110 and when I open my bags. No item level appears on the items in my bag.

[23:38:49] Error in AdiBags: Interface\AddOns\AdiBags\modules\ItemLevel.lua:339: bad argument #1 to 'unpack' (table expected, got nil) -- details: [Error 00000218CCBFBA90]
[23:38:49] Error in AdiBags: Interface\AddOns\AdiBags\modules\ItemLevel.lua:339: bad argument #1 to 'unpack' (table expected, got nil) -- details: [Error 00000218CCBFBA90]
[23:38:49] Error in AdiBags: Interface\AddOns\AdiBags\modules\ItemLevel.lua:339: bad argument #1 to 'unpack' (table expected, got nil) -- details: [Error 00000218CCBFBA90]

Thanks for the report!
This seems to be quite easy to fix, so expect it to go away with next update (just as soon as someone with commit access finds five free minutes of time).

In the meantime, you can fix this for yourself as follows.
Open AdiBags\modules\ItemLevel.lua in a text editor, find line [100] = { 615, 695 },, and add just after it a new line [110] = { 800, 875 },

Thanks!