Perspective doesn't work on 31.0.50

Hi, I'm trying to get perspective working, but any persp-command I issue gets me this error: ``` Wrong type argument: hash-table-p, "Unprintable entity" ``` Emacs version: ``` GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.48, cairo version 1.18.2) of 2025-02-14 ``` Installed from Melpa.