The sorting of items was broken.

If you have the following errors:

You cannot put on any armor or put items from your inventory in boxes or workbenches (the item “flashes” and comes back);
You cannot dress or equip your character.

It is necessary to disable all sorting options in the inventory: select the “no sorting” option.
In your inventory, in the workbench, in the chest - everywhere. A mismatch of sorting leads to an incorrect definition of the subject.
Yes, the Funсom have broken everything again.