BibMod Bag re-sizer Error message

[Vassa]

The error crops up when attempting to reduce bag size with the drag icon only:
(Bags only)
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Interface\FrameXML\ContainerFrame.lua.453:attempt to compare number with nil value
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The Bug has some quirks.

Ctrl-left-click works to bring up the percentage and that reduces bags size without issue.
Dragging slowly also allows reduction without the error message. Downsizing in a quick action generates the error, while slow, small reductions do not.

I've had one person report it causes her computer to lock up everytime. I can reproduce the problem on mine without locking.

None of the other windows' re-sizers appear affected . I'm not sure about the bank window.

I have cleared my layout-cache.txt file but I did just overwrite as opposed to a clean install.

Is anyone else seeing this error?