Updater fails to update to 20.0.6

Nextcloud version: 20.0.5 --> 20.0.6
Operating system and version (eg, Ubuntu 20.04): Debian Buster
Apache or nginx version (eg, Apache 2.4.25): replace me
PHP version (eg, 7.4): replace me

The issue you are facing:

Update with updater in terminal.

sudo -u www-data php /var/www/cloud/updater/updater.phar
Nextcloud Updater - version: v20.0.0beta4-11-g68fa0d4

Current version is 20.0.5.

Update to Nextcloud 20.0.6 available. (channel: "stable")
Following file will be downloaded automatically: https://download.nextcloud.com/server/releases/nextcloud-20.0.6.zip
Open changelog ↗

Steps that will be executed:
[ ] Check for expected files
[ ] Check for write permissions
[ ] Create backup
[ ] Downloading
[ ] Verify integrity
[ ] Extracting
[ ] Enable maintenance mode
[ ] Replace entry points
[ ] Delete old files
[ ] Move new files in place
[ ] Done

Start update? [y/N] y

Info: Pressing Ctrl-C will finish the currently running step and then stops the updater.

[✔] Check for expected files
[✔] Check for write permissions
[✔] Create backup
[✔] Downloading
[✔] Verify integrity
[ ] Extracting ...PHP Warning:  require(/var/www/cloud/updater/../version.php): failed to open stream: No such file or directory in phar:///var/www/cloud/updater/updater.phar/lib/Updater.php on line 658
PHP Fatal error:  require(): Failed opening required '/var/www/cloud/updater/../version.php' (include_path='.:/usr/share/php') in phar:///var/www/cloud/updater/updater.phar/lib/Updater.php on line 658

Nextcloud is broken, because all application files have been deleted by updater. Any advice how to get out of this?

Downloaded the ZIP manually and copied everything over, now it’s fine.

(Also had some issues with the news app, did not want to update from 14 --> 15. Removed, reinstall from app store not possible. Manual install. Now everything seems to work again.)