Error when clicking on the options after Linux Mint 19.3 to 20 update

[RMPR]

Checklist

• I use the latest release of atbswp
• The issue is not existing yet

Miscellaneous information

Operating System

Linux Mint 20

Desktop Environment/Window Manager

Cinnamon

Python version

Python 3.7

Description

since I updated from linux mint 19.3 to 20, I get this when I click on the options, and it doesn't work. Do you know what could be? Thank you:

Traceback (most recent call last):
  File "/home/cristian/atbswp/atbswp/gui.py", line 45, in on_settings_click
    self.settings_popup()
  File "/home/cristian/atbswp/atbswp/gui.py", line 103, in settings_popup
    lang_item = submenu.AppendRadioItem(wx.ID_ANY, l)
NameError: name 'l' is not defined