Galaxy timelapse frame export fails in windows build

[eliasdoehne]

Using the windows build from this workflow run https://github.com/eliasdoehne/stellaris-dashboard/actions/runs/3848208751 with unitednationsofearth7_1529854637.zip
gives this exception

MainProcess - 2023-01-06 20:00:28,583 - stellarisdashboard.dashboard_app.timelapse_exporter - INFO - Exporting timelapse frames to C:\Users\...\stellarisdashboard-windows-latest\output\galaxy-timelapse\unitednationsofearth7_1529854637-2023-01-06-200028
  0%|                                                                                            | 0/7 [00:00<?, ?it/s]
MainProcess - 2023-01-06 20:00:28,986 - stellarisdashboard.dashboard_app - ERROR - Exception on /timeline/_dash-update-component [POST]
Traceback (most recent call last):
  File "flask\app.py", line 2525, in wsgi_app
  File "flask\app.py", line 1822, in full_dispatch_request
  File "flask\app.py", line 1820, in full_dispatch_request
  File "flask\app.py", line 1796, in dispatch_request
  File "dash\dash.py", line 1274, in dispatch
    ctx.run(
  File "dash\_callback.py", line 440, in add_context
    output_value = func(*func_args, **func_kwargs)  # %% callback invoked %%
  File "stellarisdashboard\dashboard_app\graph_ledger.py", line 309, in trigger_timeline_export
  File "stellarisdashboard\dashboard_app\timelapse_exporter.py", line 71, in create_timelapse
  File "PIL\Image.py", line 2431, in save
  File "PIL\PngImagePlugin.py", line 1396, in _save
TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'

[eliasdoehne]

actually I get the same error with that db when running from the current master directly

Traceback (most recent call last):
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\dash\dash.py", line 1274, in dispatch
    ctx.run(
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\dash\_callback.py", line 440, in add_context
    output_value = func(*func_args, **func_kwargs)  # %% callback invoked %%
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\stellarisdashboard\dashboard_app\graph_ledger.py", line 309, in trigger_timeline_export
    te.create_timelapse(
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\stellarisdashboard\dashboard_app\timelapse_exporter.py", line 71, in create_timelapse
    frame.save(
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\PIL\Image.py", line 2431, in save
    save_handler(self, fp, filename)
  File "C:\Users\elias\PycharmProjects\stellaris-dashboard\env\lib\site-packages\PIL\PngImagePlugin.py", line 1396, in _save
    o32(int(dpi[0] / 0.0254 + 0.5)),
TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'

so it's probably not related to the build