Error Messages in FG

I'm getting a lot of error messages lately. Here is one of them. Any idea what could be wrong?

Script Error: [string "campaign/scripts/image.lua"]:19: attempt to call field 'onGridStateChanged' (a nil value)

Thanks for your help. :)

Edit: Never mind. I found that I had not loaded the TV size for the Player Image Auto Size add on. :)

I'm getting this and I have not changed anything but just updated. What solved it for you?

Anytime you get unfamiliar errors after an update, start by disabling all extensions and seeing if it goes away.
Most of the time, errors are from extensions.

FYI, this is Fantasy Grounds Classic, which has not received any updates since last summer.