X Error of failed request: BadWindow (invalid Window parameter) when deleting rows/columns

[Shima1371]

When I tried to reduce the grid size, I got the message "Rows/columns will be deleted from right/top. Continue?" Whether I clicked OK or Cancel, the viewer crashed and I got the following error message:

X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  15 (X_QueryTree)
  Resource id in failed request:  0x200141
  Serial number of failed request:  37632
  Current serial number in output stream:  37632

I solved this problem in the following way from

gui_master = Tk()
gui_master.title('EvoGym Design Interface GUI')

main_env = env.Env()
main_viewer = viewer.Viewer('EvoGym Design Interface')
gui_viewer = gui.GUI(gui_master, main_viewer.window_data)

to

main_env = env.Env()
main_viewer = viewer.Viewer('EvoGym Design Interface')

gui_master = Tk()
gui_master.title('EvoGym Design Interface GUI')
gui_viewer = gui.GUI(gui_master, main_viewer.window_data

In viewer.py, glfw.init() needed to be in before Tk().
I used the following link as a reference:
https://stackoverflow.com/questions/71649848/badwindow-crash-in-tkinter-after-calling-glfw-init