[Bug]: Clean install crashes on startup

[xernfptemapbuydh]

⚠️ 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

v4.0.3 persistently crashes on startup on a clean Arch Linux install (KDE, Qt6). Restarting or rm -rf .config/Nextcloud doesn't help. v4.0.2 has the same issue, v4.0.1 works.

Log doesn't have any errors, few warnings see the config dir attached below. I do have four coredumps, let me know if I should upload those somewhere.

Steps to reproduce

1. Install Arch Linux with KDE
2. # pacman -S nextcloud-client
3. Launch Nextcloud Desktop
4. Client window opens with login dialog and then immediately closes

Expected behavior

Not crashing

Which files are affected by this bug

irrelevant

Operating system

Linux

Which version of the operating system you are running.

Arch Linux (2025-12-08 10:00 UTC)

Package

Distro package manager

Nextcloud Server version

28.0.5

Nextcloud Desktop Client version

4.0.3

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

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Enabled

Are you using an external user-backend?

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

Nextcloud Server logs

Additional info

~/.config/Nextcloud: Nextcloud.tar.gz

[xernfptemapbuydh]

After login and syncing with v4.0.1 the v4.0.3 client no longer crashes on startup.

[mgallien]

@xernfptemapbuydh can you upgrade to 4.0.4 and test again ?
we would really appreciate feedback on this release that may have fixed the issue you had with 4.0.3

[xernfptemapbuydh]

Yeah, I'll give it a go! I won't be clean installing Arch again, but I'll try to reproduce it first with 4.0.3 and then 4.0.4 by uninstalling the package and moving the config and data directories out of the way. Might take a couple days before I can find a moment.

[fruel]

I had the same issue & tried to locally rebuild the 4.0.1 package. But that one crashed just the same for me.

Later, after installing the prebuilt 4.0.3 again and some other package updates it suddenly stopped crashing. I did not pay enough attention but the things I remember:

• At least once during testing I fully deleted ~/.config/Nextcloud
• One of the OS packages that was updated when it started working was chomium. It is not a direct dependency, but could there be some crosstalk between chromium and qt-webengine? I recall that one of the last lines in my logfile begore the crash was webview related.

In any case, for me 4.0.3 started to work in the same setup (haven updated to 4.0.4 yet)

[pimento2000]

I am also having this issue with a fresh Arch install (EndeavourOS) and nextcloud client 4.0.4. Tries to start, immediately crashes.