customtkinter.CTkToplevel() is not working

[Hancie123]

    def add_driver_gui():
        driver = customtkinter.CTkToplevel()
        driver_registration.DriverRegistration(driver)
        driver.mainloop()

[Akascape]

Please read the documentation for CTkTopLevel:
https://github.com/TomSchimansky/CustomTkinter/wiki/CTkToplevel

[Hancie123]

I have read it but not working properly. What can i do now?

[Akascape]

@Hancie123
Ig the problem is with driver_registration.DriverRegistration(driver)
Debug it!

[TomSchimansky]

You don't have to call .mainloop() for a TopLevel window, it just works if you called maintop on you main CTk window.