Changelog
1)The new auto-getting block from the shulker system has been added (high compatibility with the Me.Aleksilassila.Litematica.Printer mod). It seems to be no errors when even only one free slot is in hotbar (others with shulkers, for example). 2)The right mouse button bug has been fixed (which caused crashes on the main and server list screens).
Additionally, support for versions 1.21.2 - 1.21.3 has been added. Additional file - fixed mod when mixin for litematica-printer-1.21-3.2.1.jar crashes.