macOS App Sandbox breaks QtWebEngine used for SSO #9725

⚠️ 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

When I wanted to add a new nextcloud instance I was not able to do so it crashed the nextcloud instance immediately. When downgrading to the latest VFS version for Mac it worked. When updating to the latest version this particular instance was removed.

The full error log when trying to add the instance to the latest Mac OS app installed from nextcloud website.

nextcloud.error.log

Steps to reproduce

1. Add an account

It is difficult to describe (hope the logs can help) as I have my own nextcloud instance which works fine but this other one I am trying to add does not. The only thing I can think of is that it might use a different authentication method?

Expected behavior

That the account is added and the app does not crash.

Which files are affected by this bug

all

Operating system

macOS

Which version of the operating system you are running.

26.4 (25E246)

Package

Official macOS Virtual files 12+ universal pkg

Nextcloud Server version

Nextcloud hub 25 autumn

Nextcloud Desktop Client version

33.0.0

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

I am not 100% sure if it is SSO but it is an external authentication system.