After enabling 2FA, no QR code is displayed


I run the latest version of Nextcloud (25.0.5) and want to enable 2FA for the admin group. After doing so, I can see the backup code section in the personal settings of the admin user and I’m able to download the codes, but no QR code is displayed to be scanned by Google Authenticator App. Any idea, how to get this working?

Cheers Peter

Enable the app twofactor_totp

Installing this app only adds a checkbox, but still no QR code is displayed! See screenshot.