Ошибка customtkinter в python

  Exception in Tkinter callback 
Traceback (most recent call last): 
  File "C:\Users\Yaros\AppData\Local\Programs\Python\Python312\Lib\tkinter\__init__.py", line 1968, in __call__ 
    return self.func(*args) 
           ^^^^^^^^^^^^^^^^ 
  File "C:\Users\Yaros\PycharmProjects\MySofts\.venv\Lib\site-packages\customtkinter\windows\widgets\ctk_button.py", line 554, in _clicked 
    self._command() 
  File "C:\Users\Yaros\PycharmProjects\MySofts\Soft2\Firt beautiful interface.py", line 138, in <lambda> 
    startbtn = CTkButton(master=tabview.tab("Запуск"), text="START!", command=lambda: tick(chasi.get(), minuti.get(), secundi.get())) 
                                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Users\Yaros\PycharmProjects\MySofts\Soft2\Firt beautiful interface.py", line 56, in tick 
    time.sleep(float(times)) 
               ^^^^^^^^^^^^ 
ValueError: could not convert string to float: ''