Linux: No protocol specified, Traceback, _tkinter.TclError: couldn't connect to display ":0", intermezzo imposer

[dapne]

Linux debian 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u2 (2019-08-08) x86_64 GNU/Linux

Dependencies installed (tried multiple to see if it would help): python3, python3-usb, python3-libusb1, libgusb2, pypy-libusb1, python-libusb1

(Also, libusb-0.1.so.4, libusb-0.1.so.4.4.4, libusb-1.0.so.0, libusb-1.0.so.0.1.0 are present in /lib/)

When running the app.py script as sudo, I get the following error:

No protocol specified
No protocol specified
Traceback (most recent call last):
File "fusee-interfacee-tk/app.py", line 128, in
my_app = App()
File "fusee-interfacee-tk/app.py", line 14, in init
tk.Frame.init(self, master)
File "/usr/lib/python3.7/tkinter/init.py", line 2744, in init
Widget.init(self, master, 'frame', cnf, {}, extra)
File "/usr/lib/python3.7/tkinter/init.py", line 2292, in init
BaseWidget._setup(self, master, cnf)
File "/usr/lib/python3.7/tkinter/init.py", line 2259, in _setup
_default_root = Tk()
File "/usr/lib/python3.7/tkinter/init.py", line 2023, in init
self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: couldn't connect to display ":0"

Solution: DON'T run as sudo. Just run it without sudo and this error will stop.

I was brought here after this guide https://nh-server.github.io/switch-guide/user_guide/emummc/sending_payload/ which told me to run as sudo or root. In most cases, you might get stuck like I did.

But I wasn't out of the woods yet. Upon running without sudo, the GUI/user interface shows up (launches correctly) and I go to select hekate and launch the payload. But as soon as I launch the payload I get this error:

~$ python3 fusee-interfacee-tk/app.py
Could not find the intermezzo interposer. Did you build it?

Also FWIW, as far as executing the binary goes, this error shows when ran as sudo:

No protocol specified
No protocol specified
Traceback (most recent call last):
File "app.py", line 130, in
File "app.py", line 12, in init
File "tkinter/init.py", line 2744, in init
File "tkinter/init.py", line 2292, in init
File "tkinter/init.py", line 2259, in _setup
File "tkinter/init.py", line 2023, in init
_tkinter.TclError: couldn't connect to display ":0"
[4308] Failed to execute script app

But when run without sudo, I was able to execute the binary successfully, smash the stack, and boot.