cesium-desktop - Fenêtre blanche "sans titre" (Erreur split)

Je souhaité tester cesium-g1-test desktop version 1.6.7 sous Xubuntu
mais j'obtiens le splashscreen et une fenêtre "sans titre" blanche

Et voici les logs :

cesium-g1-test --debug
[12069:12069:0511/155200.123741:ERROR:component_loader.cc(165)] Failed to parse extension manifest.
[12090:12090:0511/155200.246595:ERROR:viz_main_impl.cc(176)] Exiting GPU process due to errors during initialization
[INFO]  [desktop] Opening debugger...
[INFO]  [desktop] Launching Cesium...	{"debug":true,"menu":false,"sdk":true,"home":"/home/vincentux"}
[DEBUG] [desktop] Getting settings from the local storage...
[ERROR] [desktop] Error while trying to launch Cesium: Cannot read property 'split' of null	TypeError: Cannot read property 'split' of null
    at loadSettings (chrome-extension://kcoffnlpnophcnmnlebbkdkninpnejif/cesium-desktop.js:222:96)
    at startApp (chrome-extension://kcoffnlpnophcnmnlebbkdkninpnejif/cesium-desktop.js:518:5)
    at chrome-extension://kcoffnlpnophcnmnlebbkdkninpnejif/cesium-desktop.js:553:20
[12069:12069:0511/155202.094578:ERROR:CONSOLE(1)] "Uncaught ReferenceError: DevToolsAPI is not defined", source: devtools://devtools/bundled/devtools_app.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@ac9418ba9c3bd7f6baaffa0b055dfe147e0f8364/&dockSide=undocked (1)
[12069:12069:0511/155202.094738:ERROR:CONSOLE(1)] "Uncaught ReferenceError: DevToolsAPI is not defined", source: devtools://devtools/bundled/devtools_app.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@ac9418ba9c3bd7f6baaffa0b055dfe147e0f8364/&dockSide=undocked (1)

Et cesium --debug (v1.6.7 également) s'ouvre bien mais a aussi cette fenêtre blache par dessus...
Voici les logs :

cesium --debug
[12592:12592:0511/155957.409478:ERROR:component_loader.cc(165)] Failed to parse extension manifest.
[12614:12614:0511/155957.539912:ERROR:viz_main_impl.cc(176)] Exiting GPU process due to errors during initialization
[12626:12637:0511/155957.692423:ERROR:command_buffer_proxy_impl.cc(124)] ContextResult::kTransientFailure: Failed to send GpuChannelMsg_CreateCommandBuffer.
[INFO]  [desktop] Opening debugger...
[INFO]  [desktop] Launching Cesium...	{"debug":true,"menu":false,"sdk":true,"home":"/home/vincentux"}
[DEBUG] [desktop] Getting settings from the local storage...
[INFO]  [desktop] User home:  	/home/vincentux
[INFO]  [desktop] User locale:	fr
[INFO]  [desktop] Preparing settings...
[DEBUG] [desktop] Opening window {id: 'cesium', title: 'Cesium'} ...
[12592:12592:0511/155959.511252:ERROR:CONSOLE(1)] "Uncaught ReferenceError: DevToolsAPI is not defined", source: devtools://devtools/bundled/devtools_app.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@ac9418ba9c3bd7f6baaffa0b055dfe147e0f8364/&dockSide=undocked (1)
[12592:12592:0511/155959.511305:ERROR:CONSOLE(1)] "Uncaught ReferenceError: DevToolsAPI is not defined", source: devtools://devtools/bundled/devtools_app.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@ac9418ba9c3bd7f6baaffa0b055dfe147e0f8364/&dockSide=undocked (1)
[INFO]  [desktop] Opening debugger...
[12592:12592:0511/160000.616917:ERROR:CONSOLE(1)] "Uncaught ReferenceError: DevToolsAPI is not defined", source: devtools://devtools/bundled/devtools_app.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@ac9418ba9c3bd7f6baaffa0b055dfe147e0f8364/&dockSide=undocked (1)
[12592:12592:0511/160000.616971:ERROR:CONSOLE(1)] "Uncaught ReferenceError: DevToolsAPI is not defined", source: devtools://devtools/bundled/devtools_app.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@ac9418ba9c3bd7f6baaffa0b055dfe147e0f8364/&dockSide=undocked (1)
[DEBUG] [storage] Starting {local} storage...
[DEBUG] [settings] Locale [fr-FR]
[DEBUG] [cache] Creating cache {csWot-idty-300s} with {storageMode: memory}...
[DEBUG] [cache] Creating cache {csWot-requirements-300s} with {storageMode: memory}...
[DEBUG] [app] Root path is [chrome-extension://eddgpcgfbhhopcmllclnjdoiepjnmnjj/cesium/index.html]
[DEBUG] [settings] Starting...
[DEBUG] [cache] Creating cache {esWot-memberships-300s} with {storageMode: memory}...
[DEBUG] [crypto] Starting...
[DEBUG] [crypto] Loading 'FullJS' implementation...
[WARN]  pre-main prep time: 3 ms
[DEBUG] [cache] Creating cache {csHttp-3600s} with {storageMode: memory}...
[DEBUG] [device] Ionic platform ready - no device detected.
[DEBUG] [storage] Started in 238ms
[DEBUG] [settings] Loaded from local storage in 4ms
[DEBUG] [settings] Started
[DEBUG] [BMA] Starting g1.presles.fr {ssl: true)...
[DEBUG] [http] Checking actual version [1.7.21] is compatible with min expected version [1.1.0]
[DEBUG] [BMA] Started in 786ms
[DEBUG] [currency] Starting...
[DEBUG] [cache] Creating cache {BMA-54000s} with {storageMode: memory}...
[DEBUG] [cache] Creating cache {BMA-300s} with {storageMode: memory}...
[DEBUG] [crypto] Loaded 'FullJS' implementation in 1093ms
[DEBUG] [http] Waiting websocket [/ws/block]...
[DEBUG] [currency] Started in 207ms
[DEBUG] [wallet] Starting...
[DEBUG] [wallet] Restore {5dzkzedB} from local storage
[DEBUG] [wallet] Started in 13ms
[DEBUG] [filter] Loading translations for locale [fr-FR]
[DEBUG] [home] Loading feeds from https://raw.githubusercontent.com/duniter/cesium/master/doc/feed/feed-fr.json...
[DEBUG] [cache] Creating cache {3600s} with {storageMode: memory}...
[DEBUG] [ES] [http] Starting on [g1.data.presles.fr] (SSL on)...
[DEBUG] [filter] Computing constants from currency parameters
[DEBUG] [ES] [http] Started in 232ms
[DEBUG] [ES] [profile] Enable
[DEBUG] [ES] [notification] Enable
[DEBUG] [ES] [notification] Loading count...5dzkzedB
[DEBUG] [ES] [wallet] Enable
[DEBUG] [ES] [wallet] Loading user avatar+name...
[DEBUG] [ES] [message] Enable
[DEBUG] [ES] [message] Loading count...
[DEBUG] [ES] [subscription] Enable
[DEBUG] [ES] [registry] Loading pages count...
[DEBUG] [ES] [group] Enable
[DEBUG] [ES] [invitations] Enable
[DEBUG] [ES] [invitation] Loading count...
[DEBUG] [ES] [subscription] Enable
[DEBUG] [ES] [subscription] Loading subscriptions count...
[DEBUG] [ES] [tx] Enable
[DEBUG] [ES] [settings] Enable
[INFO]  [app] Current version [1.6.7] is the latest release
[DEBUG] [http] Waiting websocket [/ws/block]...
[DEBUG] [ES] [notification] Loaded count (0) in 95ms
[DEBUG] [ES] [notification] Starting listen user event...
[DEBUG] [http] Waiting websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [ES] [message] Loaded count (0) in 99ms
[DEBUG] [ES] [group] Detecting 0 unread notifications
[DEBUG] [ES] [wallet] Loaded user avatar+name in 111ms
[DEBUG] [ES] [registry] Loaded pages count (0)
[DEBUG] [ES] [invitation] Loaded count (0) in 141ms
[DEBUG] [ES] [subscription] Loaded count (1)
[DEBUG] [home] Feeds loaded in 425ms
[DEBUG] [http] Waiting websocket [/ws/block]...
[DEBUG] [http] Waiting websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [http] Waiting websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [http] Listening on websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [http] Listening on websocket [/ws/block]...
[DEBUG] [currency] Received new block {321413-00000052B3BB3B7D4499969FC1C9CB0931803502565E0256C4CC27217437D976}
[DEBUG] [http] Unexpected close of websocket [{0}] (open {1} ms ago): re-opening...	/ws/event/user/:pubkey/:locale60000
[DEBUG] [http] Waiting websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [http] Waiting websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [http] Listening on websocket [/ws/event/user/:pubkey/:locale]...
[DEBUG] [currency] Received new block {321414-0000056C5ECA0A60E03647CAFED80008B525C086397E4B78BFEE94D1C0DBA9AA}