[Bug]: [PPA installation] Unable to show the Nextcloud Desktop window

[webafrancois]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

I upgrade from the nextcloud-devs repositories from ubuntu (on my Linux Mint Cinamonn 22.2) to the 4.0.0 client.
And I cannot see the Nextcloud Desktop window.
I see that the app is working on "Settings" when I force the synchronisation, but the window never appear.

Steps to reproduce

1. upgrade the app from nextcloud-devs repositories ubuntu
2. stop the old app and execute the new
3. left-clic on the icon, or right-clic and choose "Open Nextcloud Desktop".
4. Nothing is happenning
   ...

Expected behavior

When I use ther App image, I can see the window
...

Which files are affected by this bug

Nextcloud app

Operating system

Linux

Which version of the operating system you are running.

Linux Mint Cinamonn 22.2

Package

Other

Nextcloud Server version

31.0.9

Nextcloud Desktop Client version

4.0.0

Is this bug present after an update or on a fresh install?

Updated to a major version (ex. 3.16.3 to 3.17.0)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

Additional info

Works well with the App Image.

[nilsding]

Can you share the client logs when trying to open the window? The client writes the logs to ~/.config/Nextcloud/logs, the most recent one should contain them (keep an eye out for messages that contain qml)

[Sebfff]

@nilsding Hello I've the exact same problem in Linux Mint 22.2 Zara base: Ubuntu 24.04 noble

My log with the qml extract says :

2025-10-22 14:51:59:270 [ warning default qrc:/qml/src/gui/tray/ActivityList.qml:77 ]: qrc:/qml/src/gui/tray/ActivityList.qml:77:20: QML QQuickRectangle: Cannot anchor to an item that isn't a parent or sibling.

Thanks a lot

[webafrancois]

My logs with qml are :

20251022_1552_nextcloud.log.0:2025-10-22 15:52:46:854 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "Activity"; value type names should begin with a lowercase letter
20251022_1552_nextcloud.log.0:2025-10-22 15:52:46:854 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "TalkNotificationData"; value type names should begin with a lowercase letter
20251022_1552_nextcloud.log.0:2025-10-22 15:52:46:854 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "UserStatus"; value type names should begin with a lowercase letter
20251022_1552_nextcloud.log.0:2025-10-22 15:52:46:854 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "Sharee"; value type names should begin with a lowercase letter
20251022_1552_nextcloud.log.0:2025-10-22 15:52:46:926 [ warning nextcloud.gui.systray ./src/gui/systray.cpp:121 ]:	"qrc:/qml/src/gui/tray/MainWindow.qml:160 Type UserStatusSelectorPage unavailable\nqrc:/qml/src/gui/UserStatusSelectorPage.qml:46 Type UserStatusMessageView unavailable\nqrc:/qml/src/gui/UserStatusMessageView.qml:100 Type EmojiPicker unavailable\nqrc:/qml/src/gui/EmojiPicker.qml:119 Cannot assign to non-existent property \"popupType\"\n"
20251022_1553_nextcloud.log.0:2025-10-22 15:53:48:442 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "Activity"; value type names should begin with a lowercase letter
20251022_1553_nextcloud.log.0:2025-10-22 15:53:48:442 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "TalkNotificationData"; value type names should begin with a lowercase letter
20251022_1553_nextcloud.log.0:2025-10-22 15:53:48:442 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "UserStatus"; value type names should begin with a lowercase letter
20251022_1553_nextcloud.log.0:2025-10-22 15:53:48:442 [ warning qt.qml.typeregistration unknown:0 ]:	Invalid QML element name "Sharee"; value type names should begin with a lowercase letter
20251022_1553_nextcloud.log.0:2025-10-22 15:53:48:527 [ warning nextcloud.gui.systray ./src/gui/systray.cpp:121 ]:	"qrc:/qml/src/gui/tray/MainWindow.qml:160 Type UserStatusSelectorPage unavailable\nqrc:/qml/src/gui/UserStatusSelectorPage.qml:46 Type UserStatusMessageView unavailable\nqrc:/qml/src/gui/UserStatusMessageView.qml:100 Type EmojiPicker unavailable\nqrc:/qml/src/gui/EmojiPicker.qml:119 Cannot assign to non-existent property \"popupType\"\n"

[nilsding]

@webafrancois thanks for the logs, I see what's happening there

the popupType property was added to Qt 6.8, which is much newer than what's available in the Mint/Ubuntu 24.04 repos. The AppImage includes a newer build of Qt which explains why that one's working fine.