Show log button - filepath should be not NoneType

[sjib]

Describe the bug

2024-06-12T16:40:44     WARNING    Traceback (most recent call last):
              File "C:\Users/Stefan/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\qgepplugin\qgepqwat2ili\qgepqwat2ili\gui\__init__.py", line 64, in 
              button.pressed.connect(lambda p=log_path: webbrowser.open(p))
              File "C:\PROGRA~1\QGIS 3.28.4\apps\Python39\lib\webbrowser.py", line 86, in open
              if browser.open(url, new, autoraise):
              File "C:\PROGRA~1\QGIS 3.28.4\apps\Python39\lib\webbrowser.py", line 603, in open
              os.startfile(url)
             TypeError: startfile: filepath should be string, bytes or os.PathLike, not NoneType

To Reproduce
Exact steps to reproduce the behavior:

1. Make an INTERLIS export
2. Click the the "Show logs" Button
3. See error

Expected behavior
Either button should not be displayed with that message or link should be correct to display the logs.

Screenshots / data

Desktop (please complete the following information):

• QGEP plugin version
• QGEP datamodel version
• QGEP project file version
• QGIS Version
• OS

Additional context
Add any other context about the problem here.