Error: "Couldn’t Connect to Display ':0'" When Connecting to Training and Learnings Suite (TLS) Remote Agent

• Installed Intel Edge Insights for Industrial
• Attempted to connect to TLS Remote Agent and ran into the following error

File "/usr/lib/python3.6/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"

The application was unable to connect to display 0.

1. Verify the display name by running the who command in your terminal
2. Update the DISPLAY variable
   • export DISPLAY=":0"
3. Disable access control
   • xhost +