When I run the program, I get a blank window. I have macOS Catalina. <img width="369" height="599" alt="Image" src="https://github.com/user-attachments/assets/f6fc68a2-4b31-4e10-a5ac-b637e16fc3aa" />
When I run the program, I get a blank window.
I have macOS Catalina.