[Bug]: Installation hangs forever

[acisternino]

⚠️ 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

While upgrading from a working 3.11.1 installation the installer for 3.12.0 hangs forever on the "Please wait while the Setup Wizard installs Nextcloud."

The UAC dialog asking for permission to install something never pops up.

Clicking on Cancel doesn't do anything.

Steps to reproduce

1. Reboot after Nextcloud client informs that an update is available
2. The update process starts automatically and subsequently hangs up

Expected behavior

The update process terminates correctly.

Which files are affected by this bug

The client installation

Operating system

Windows

Which version of the operating system you are running.

Windows 10 x64 22H2 Build 19045.4046

Package

Other

Nextcloud Server version

27.1.5

Nextcloud Desktop Client version

3.12.0

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

Updated to a major version (ex. 3.3.6 to 3.4.0)

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

No response

Additional info

No response

[joshtrichards]

If you use - is the UAC window available somewhere?

[melconify]

I observerd the same behaviour today, the UAC prompt never shows (it's also not hidden). After a while a window pops up: installation is no longer responding. This window has the option to retry or just cancel all along. Also tried silent install which just terminates after a while. Trying to upgrade from 3.13.3 to 3.13.4.