Installation error on Ubuntu 20.04

[olivierb2]

Hello,

I followed the instruction regarding the installation on Ubuntu 20.04, and I'm getting the following error on database choosing.

## 16/09/2021 14:23:12 | 1.2.9.9 | wxPython 4.1.1 gtk3 (phoenix) wxWidgets 3.1.5 | linux Linux 5.11.0-34-generic x86_64 ##
Traceback (most recent call last):
  File "/home/olivierb/.local/lib/python3.8/site-packages/wx/lib/mixins/gridlabelrenderer.py", line 123, in _onPaintColLabels
    cols = self.CalcColLabelsExposed(window.GetUpdateRegion())
wx._core.wxAssertionError: C++ assertion "idx >= 0 && idx < m_numCols" failed at /home/wxpy/wxPython-4.1.1/ext/wxWidgets/include/wx/generic/grid.h(2081) in GetColPos(): invalid column index

I also tested on Debian, and this is the same.

[capybarbu]

Ubuntu 20.10 & same error everywhere. If i hide all the sides panels on main window (ephemeride & side grids), seems to happen less.