Error when selecting cubemenu to change font size.

[onekk]

When selecting cubemenu I get this error

16:25:48  Traceback (most recent call last):
16:25:48    File "/home/common/FreeCAD/config/Mod/CubeMenu/CubeMenuGui.py", line 88, in onPreferences
16:25:48      dialog = cpp.dialog()
16:25:48    File "/home/common/FreeCAD/config/Mod/CubeMenu/CubeMenuPreferences.py", line 134, in dialog
16:25:48      stack.insertWidget(0, general(dia, stack, btnClose, btnSettings))
16:25:48    File "/home/common/FreeCAD/config/Mod/CubeMenu/CubeMenuPreferences.py", line 675, in general
16:25:48      populateCBoxWb()
16:25:48    File "/home/common/FreeCAD/config/Mod/CubeMenu/CubeMenuPreferences.py", line 312, in populateCBoxWb
16:25:48      icon = cpc.wbIcon(wb[i].Icon)
16:25:48    File "/home/common/FreeCAD/config/Mod/CubeMenu/CubeMenuCommon.py", line 67, in wbIcon
16:25:48      icon.append((a
16:25:48  IndexError: list index out of range

OS: Artix Linux (openbox)
Word size of FreeCAD: 64-bit
Version: 0.20.26155 (Git) AppImage
Build type: Release
Branch: master
Hash: 0926a4148bcff11249fd4f56bc30256102ffe105
Python version: 3.9.7
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.3
Locale: Italian/Italy (it_IT)

Regards

carlo D.