Ubuntu 24.04: Proton VPN 4.9.1 not loading properly unless I sign out and login of Proton account

[jugular253]

Proton VPN 4.9.1 not loading properly unless I sign out and login of Proton account.

Here's my terminal output when I first started the Proton VPN app:

~$ protonvpn-app
2025-02-21T04:44:30.433038+00:00 | proton.vpn.session.session:96 | WARNING | VPN session could not be deserialized.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/proton/vpn/session/session.py", line 92, in __setstate__
    self._server_list = self._fetcher.load_server_list_from_cache()
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/proton/vpn/session/fetcher.py", line 113, in load_server_list_from_cache
    return self._server_list_fetcher.load_from_cache()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/proton/vpn/session/servers/fetcher.py", line 128, in load_from_cache
    raise ServerListDecodeError("Cached server list was not found")
proton.vpn.session.exceptions.ServerListDecodeError: Cached server list was not found
2025-02-21T04:44:30.801754+00:00 | proton.vpn.core.connection:472 | INFO | CONN:STATE_CHANGED | Disconnected (initial state)
2025-02-21T04:44:31.090973+00:00 | proton.vpn.app.gtk.app:57 | INFO | APP:PROCESS_START | self=<app.App object at 0x75a9f718b080 (proton+vpn+app+gtk+app+App at 0x226e4a50)>
2025-02-21T04:44:31.213438+00:00 | proton.vpn.app.gtk.utils.exception_handler:257 | CRITICAL | APP:CRASH | Unexpected error.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/proton/vpn/app/gtk/widgets/main/main_widget.py", line 81, in <lambda>
    self.connect("show", lambda *_: self.initialize_visible_widget())
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/proton/vpn/app/gtk/widgets/main/main_widget.py", line 113, in initialize_visible_widget
    self._display_vpn_widget()
  File "/usr/lib/python3/dist-packages/proton/vpn/app/gtk/widgets/main/main_widget.py", line 182, in _display_vpn_widget
    self.vpn_widget = self._create_vpn_widget()
                      ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/proton/vpn/app/gtk/widgets/main/main_widget.py", line 169, in _create_vpn_widget
    vpn_widget = VPNWidget(
                 ^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/proton/vpn/app/gtk/widgets/vpn/vpn_widget.py", line 84, in __init__
    self.connection_status_widget = VPNConnectionStatusWidget(
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/proton/vpn/app/gtk/widgets/vpn/connection_status_widget.py", line 60, in __init__
    .get("DisplayPortForwarding")
     ^^^AttributeError: 'NoneType' object has no attribute 'get'

And here's the terminal output after I signed out and logged into my Proton account:

2025-02-21T06:03:01.485631+00:00 | proton.vpn.core.connection:472 | INFO | CONN:STATE_CHANGED | Disconnected (initial state)
2025-02-21T06:03:01.779660+00:00 | proton.vpn.app.gtk.app:57 | INFO | APP:PROCESS_START | self=<app.App object at 0x7a053893e500 (proton+vpn+app+gtk+app+App at 0x2bbbde90)>
2025-02-21T06:03:01.897622+00:00 | proton.vpn.core.refresher.vpn_data_refresher:167 | INFO | APP.VPN_DATA_REFRESHER:ENABLE | VPN data refresher service enabled.
2025-02-21T06:03:01.898313+00:00 | proton.vpn.core.refresher.vpn_data_refresher:175 | INFO | Next client config refresh scheduled in 2:25:53.029466
2025-02-21T06:03:01.898603+00:00 | proton.vpn.core.refresher.vpn_data_refresher:184 | INFO | Next server list refresh scheduled in 0:01:58.679786
2025-02-21T06:03:01.901323+00:00 | proton.vpn.core.refresher.vpn_data_refresher:193 | INFO | Next certificate refresh scheduled in 5 days, 5:13:53.098899
2025-02-21T06:03:01.902099+00:00 | proton.vpn.core.refresher.vpn_data_refresher:202 | INFO | Next feature flags refresh scheduled in 1:09:28.363285
2025-02-21T06:03:01.962174+00:00 | proton.vpn.app.gtk.services.reconnector.reconnector:95 | INFO | VPN reconnector enabled.
2025-02-21T06:03:02.369912+00:00 | proton.vpn.app.gtk.controller:147 | INFO | APP.STARTUP:STARTUP_ACTIONS | Running startup actions
2025-02-21T06:03:02.370121+00:00 | proton.vpn.app.gtk.widgets.vpn.vpn_widget:199 | INFO | APP.VPN:WIDGET_READY | VPN widget is ready (load time: 0.47 seconds)
2025-02-21T06:03:02.374876+00:00 | proton.vpn.app.gtk.services.reconnector.reconnector:175 | INFO | Network connectivity was detected.

[defUserName-404]

I had the same issue on Debian 12 Kde. I had to log out and log back in to solve the issue. Deleting caches and config file did not work.

[calexandru2018]

Hey @jugular253, thanks for the report 👍🏻
We're aware of this issue and have already issued a fix on python3-proton-vpn-api-core v0.42.2, which is currently available on the beta branch. It will be available on the stable branch next monday.