[Python] startx doesn't load python tkinter app openbox

Im using openbox to control a tkinter app. My app is t.py and is located in ~.

This is my ~/.config/openbox/autostart:

python3 ~/t.py


This is t.py:

import tkinter as tk

root = tk.Tk()
label = tk.Label(root, text="Hello")
label.pack()
root.mainloop()


When I run sudo startx, I can see the cursor pop up then hide, but after that its just a black screen. I am running these commands over ssh as well. I had this working before with a separate .py file but can no longer get it to work. I am running this on a Raspberry Pi Zero 2 W with a HDMI screen. The Pi is installed with the latest Raspberry Pi OS Lite.

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