Crash with AttributeError: 'NoneType' object has no attribute 'convertLong'

[mahdi1234]

Gentoo with python 3.7

$ python3.7 ./main.py 
Traceback (most recent call last):
  File "/mnt/notes.data/OSM/map-stylizer/src/gui/MainWindow/MainWindowHandlers.py", line 203, in loadOSMFile
    self._map.setOSMFile(fileName)
  File "/mnt/notes.data/OSM/map-stylizer/src/gui/Widgets/mapwidget.py", line 80, in setOSMFile
    self._map = Map(self.width(), self.height(), fname, self._config)
  File "/mnt/notes.data/OSM/map-stylizer/src/core/Map.py", line 147, in __init__
    node = Node(child.attrib, transform)
  File "/mnt/notes.data/OSM/map-stylizer/src/core/Map.py", line 28, in __init__
    self._x = transform.convertLong(float(attrib['lon']))
AttributeError: 'NoneType' object has no attribute 'convertLong'
Aborted

when opening attached file

zdanice_2020_cesty.zip

file works fine with JOSM/Maperitive.