Came here to say that I had this same issue. Even the command line updater gave me the same error. So I updated manually following these instructions. It seemed to work, but the web UI still says I’m at 28.0.1 and there’s an update available to 28.0.2.
However, I tried updating via the command line and I get:
# sudo -u www-data php /var/www/nextcloud/updater/updater.phar
Nextcloud Updater - version: v28.0.2rc2-1-gba2e50f dirty
Current version is 28.0.2.
No update available.
Nothing to do.
I’m also getting errors in my logs:
Could not find resource core/js/global-search.js to load
