I recently had to switch to a new version of the plugin.
Not all skins are displayed. I believe skins that have not been confirmed by the developers are not displayed. But why is that? After all, for example, you can add any skins to skinbox, and they are displayed well. And they are not displayed in the Kits plugin.

(12:53:45) | [Image Library] Starting order Kits
(12:53:45) | [Image Library] 34 workshop skin ID's for image batch (Kits) are invalid! They may have been removed from the workshop
IDs: 1638135398, 1638812721, 10088, 10033, 10001, 10028, 10065, 10001, 1638135398, 1638812721, 10088, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128, 10128 and 10128
(12:53:46) | Image batch (Kits) has been stored successfully
(12:54:09) | BS_TRAIN Clay[4312158] was killed by Greshnik