No (empty) admin page, what is wrong (error log)?

Hi, I installed owncloud 9.1 which seems to worḱ, but unfortunately I didn't get any admin page. Rest is there. My logfile shows the following which I can't understand. Can somebody help me out? Bernd

{"reqId":"J4yY82TEC271LY7BuX04","remoteAddr":"","app":"PHP","message":"Argument 2 passed to OC\Updater::__construct() must be an instance of OC\IntegrityCheck\Checker,
instance of OC\AllConfig given, called in \/var\/www\/owncloud\/apps\/updater\/lib\/channel.php on line 76 and defined at \/var\/www\/owncloud\/lib\/private\/Updater.php#84","level":3,
{"reqId":"J4yY82TEC271LY7BuX04","remoteAddr":"","app":"PHP","message":"Call to undefined method OC\Updater::check() at \/var\/www\/owncloud\/apps\/updater\/lib\/channel.php#78",


you have somehow managed to install the "old" updater app from older versions to /var/www/owncloud/apps/updater This app is not compatible with 9.1 and is causing your issue.

Hi, Thank you. How can I fix this - is there a way to install the new updater or do I need to do the installation again? If so how to get rid of everything?

That heavily depends how you managed to break this. The old updater app is not shipped in any of the installation ways provided at so it might be interesting how you got that app installed and if there are any other older stuff installed.

I followed a tutorial, basically I used this to install.

wget -nv -O Release.key
sudo apt-key add - < Release.key
sudo sh -c "echo 'deb /' >> /etc/apt/sources.list.d/owncloud.list"

sudo apt-get update
sudo apt-get install owncloud


the repositories listed there are not providing this old updater app in their packages.

The best is probably to purge all ownCloud packages (apt-get remove --purge owncloud*). Afterwards make sure that there are no files left in /var/www/owncloud. Then you can do a fresh installation via apt-get install owncloud and the issue is gone.