File "/home/beams0/OGASSANT/Documents/tiled-viz2023/gemviz23/demo/resultwindow.py", line 163, in setup
self.cat = FilterPanel.server(self.mainwindow)['developer']
File "/home/beams0/OGASSANT/Documents/tiled-viz2023/gemviz23/demo/filterpanel.py", line 35, in server
return self._server
AttributeError: 'MainWindow' object has no attribute '_server'