HELP: My kali died!

Type your comment> @seke said:

You must be talking about the kali from oscp , i lost my minds with that and almost switched to the old practicing 64 bit kali. Very long annoying story short you have to downgrade the libidn2.0 library to a lower version AFTER reverting the machine. I suppose wget is not working either.

Hmm, i have no idea how to do that.
is there any tut about this procedure?