[Crash] UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbc in position 4608: invalid start byte

[OldDragon88]

Please fill out following when reporting a new bug:

Describe the bug
When I tried to launch ProtonUp-Qt it shows the following error and won't launch:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/app/lib/python3.11/site-packages/pupgui2/__main__.py", line 2, in <module>
    main()
  File "/app/lib/python3.11/site-packages/pupgui2/pupgui2.py", line 588, in main
    MainWindow()
  File "/app/lib/python3.11/site-packages/pupgui2/pupgui2.py", line 115, in __init__
    self.update_ui()
  File "/app/lib/python3.11/site-packages/pupgui2/pupgui2.py", line 249, in update_ui
    global_ctool_name: str = get_steam_global_ctool_name(install_loc.get('vdf_dir'))
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/lib/python3.11/site-packages/pupgui2/steamutil.py", line 221, in get_steam_global_ctool_name
    d = get_steam_vdf_compat_tool_mapping(vdf.load(open(config_vdf_file)))
                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/lib/python3.11/site-packages/vdf/__init__.py", line 211, in load
    return parse(fp, **kwargs)
           ^^^^^^^^^^^^^^^^^^^
  File "/app/lib/python3.11/site-packages/vdf/__init__.py", line 97, in parse
    for lineno, line in enumerate(fp, 1):
  File "<frozen codecs>", line 322, in decode
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbc in position 4608: invalid start byte

To Reproduce
Steps to reproduce the behavior:

1. flatpak run net.davidotek.pupgui2
2. Error as described

Desktop (please complete the following information):

• Platform: PC
• System: Arch
• Version: ProtonUp-Qt 2.10.0
• How did you install ProtonUp-Qt?: Flatpak

[DavidoTek]

It seems to be a duplicate of #424. I will reopen issue 424 to continue the discussion there as it appears to be still a problem.

Error in 424: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xfd in position 2170: invalid start byte
Your error: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbc in position 4608: invalid start byte