Crash on startup: KeyError: 8 (Czech keyboard)

[Meldiron]

Describe the bug

When launching the app while having Czech keyboard active, the app crashes. Starting it with english keyboard works fine, but when running an I switch to Czech, it instantly crashes.

To Reproduce

Steps to reproduce the behavior:

1. Use Czech layout (MacOS)
2. Start Plover
3. (crash)

Expected behavior

Plover works with czech layout too (or disables, but starts working again after switching back to english layout.

Screenshots

Traceback (most recent call last):
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/scripts/main.py", line 131, in main
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/gui_qt/main.py", line 129, in main
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/gui_qt/main.py", line 67, in __init__
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/oslayer/osx/keyboardcontrol.py", line 311, in __init__
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/oslayer/osx/keyboardlayout.py", line 130, in __init__
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/oslayer/osx/keyboardlayout.py", line 152, in _update_layout
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/oslayer/osx/keyboardlayout.py", line 260, in _get_layout
  File "/Users/runner/work/plover/plover/build/osxapp/Plover.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.9/site-packages/plover/oslayer/osx/keyboardlayout.py", line 411, in _parse_layout
KeyError: 8

Crash report: (can provide if requested, they are huge)

Operating system

• MacOS 14.5 (23F79)
• Plover 4.0.0rc2

Hardware

Macbook Pro 2021