GUI app build module not found error

/Users/CL/spatial-media-project/spatialmedia/dist/Spatial\ Media\ Metadata\ Injector ; exit;
CL@MacBookPro143 ~ % /Users/CL/spatial-media-project/spatialmedia/dist/Spatial\ Media\ Metadata\ Injector ; exit;
Traceback (most recent call last):
File "gui.py", line 32, in
ModuleNotFoundError: No module named 'tkinter'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "gui.py", line 37, in
ModuleNotFoundError: No module named 'Tkinter'
[PYI-27156:ERROR] Failed to execute script 'gui' due to unhandled exception: No module named 'Tkinter'
[PYI-27156:ERROR] Traceback:
Traceback (most recent call last):
File "gui.py", line 32, in
ModuleNotFoundError: No module named 'tkinter'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "gui.py", line 37, in
ModuleNotFoundError: No module named 'Tkinter'

Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]