Getting this error after update 10.6, addon no longer works for me.

Message: Interface\AddOns\BagSync\BagSync.lua:1079: bad argument #1 to 'sort' (table expected, got nil) Time: 10/26/16 16:33:40 Count: 6 Stack: [C]: in functionsort'
Interface\AddOns\BagSync\BagSync.lua:1079: in function `AddItemToTooltip'
Interface\AddOns\BagSync\BagSync.lua:1180: in function <Interface\AddOns\BagSync\BagSync.lua:1174>

C: in function SetBagItem' Interface\FrameXML\ContainerFrame.lua:1149: in functionContainerFrameItemButton_OnEnter'
[string ":OnEnter"]:1: in function <[string ":OnEnter"]:1>

Locals: (_temporary) = nil
(_temporary) = defined @interface\AddOns\BagSync\BagSync.lua:1079
(*temporary) = "table expected, got nil"
`

Logon to one character of each of the servers you have characters on. It will fix that error. I'll add error checks for this in an upcoming update.

Version 10.7 which I just pushed should address the NIL issue. That only occurs if you haven't logged in to other characters on other servers yet.