Error with BattlePets

[evharten]

If i have an Battlepet in my bags (learned, put in cage), Zygor goes haywire.
Keeps spamming:

Message: ...ddOns\ZygorGuidesViewer\GoldUI\Auctiontools-Core.lua:1022: bad argument #4 to 'format' (string expected, got nil)
Time: 09/03/17 05:50:23
Count: 73
Stack: ...ddOns\ZygorGuidesViewer\GoldUI\Auctiontools-Core.lua:1022: bad argument #4 to 'format' (string expected, got nil)
[C]: ?
[C]: in function `format'
...ddOns\ZygorGuidesViewer\GoldUI\Auctiontools-Core.lua:1022: in function <...ddOns\ZygorGuidesViewer\GoldUI\Auctiontools-Core.lua:926>

Locals:

Have to remove the item from my bags (to my bank for instance) to make sure it doesnt happen.
Doesnt matter which battlepet, they all do it so far. (have tried multiple different ones)

[ZG Support 1]

We'll check into this.