[Bug]: Windows 11 Client Crashes When Opening Settings with Multiple Accounts or Sync Folders

[Simi5599]

⚠️ 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

After setting up multiple folder synchronizations (or adding multiple user accounts, each with one sync folder), the Nextcloud desktop client freezes and crashes when attempting to open the Settings window (not the status popup from the system tray, but the full Settings dialog)

By my research this occurs only when:

• More than one folder is configured for synchronization
• Two or more user accounts are logged in simultaneously (each with one or multiple sync folder)

Synchronization itself works correctly, and the client runs normally until the Settings window is opened.

Steps to reproduce

1. Set up multiple folder syncs for a single user, or add a second user account (with at least one sync folder each)
2. Confirm that synchronization works and the client runs normally
3. Close and restart the Nextcloud desktop client.
4. Click on the system tray icon → select "Settings"
5. The application freezes and crashes immediately.

Expected behavior

The Settings window should open reliably regardless of the number of synced folders or logged-in user accounts.

Which files are affected by this bug

N/A

Operating system

Windows

Which version of the operating system you are running.

Windows 11

Package

Official Windows MSI

Nextcloud Server version

31.0.8

Nextcloud Desktop Client version

3.17.1

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 Disabled

Are you using an external user-backend?

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

Nextcloud Server logs

Additional info

No response

[mgallien]

@Simi5599 can you try again with 3.17.2 ?
in case you reproduce, you might want to have a look into ${TEMP} or ${TMP} for a file named Nextcloud-crash.log
this was missing until 3.17.2

[Simi5599]

Hi, sorry for my late response.
I have tried again with 3.17.2 without success, same problem
I looked in temp and %temp% folders but no luck.

I have a Nextcloud folder in AppData/Roaming/Nextcloud but no such file

EDIT: I have also updated to Nextcloud 32 and the issue persists.

[Simi5599]

Update: It seems that occasionally, also the status popup from the system tray crashes. This happened after the update to Nextcloud 32