Thanks for reporting!
I need to check in detail, but you can almost certainly ignore this error: these images are all almost squares – I need to check the math, but I would guess that some of the thumbnails Tropy generates for these will end up perfect squares. Since we used to have square thumbnails, there is a bit of code in Tropy that tries to detect images which are not square but where the thumbnails are square: such thumbnails are almost always ‘old’ thumbnails that need to be re-generated but there is a small chance for false positives. This is almost certainly the case here. We’ll remove the detection of old thumbnails in the next release, so this warning will just disappear.