Appimage Linux-Cru can't run - Python may not be configured for Tk

I've been trying to get the appimage for Linux-CRU to run on my Bazzite desktop and I keep getting errors about python not configured for Tk and libBLT cannot open files and stuff.
I'm getting the error Traceback (most recent call last): File "/tmp/.mount_Linux_KLBeoe/usr/bin/linux_cru", line 2, in <module> import tkinter as tk File "/tmp/.mount_Linux_KLBeoe/usr/lib/python3.12/tkinter/__init__.py", line 38, in <module> import _tkinter # If this fails your Python may not be configured for Tk ^^^^^^^^^^^^^^^ ImportError: libBLT.2.5.so.8.6: cannot open shared object file: No such file or directory

I've tried installing python-tk with brew, with rpm-ostree, inside a fedora distrbox. and I keep getting the same error as above.

Any advice on what to try next?
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