Hi,
the documentation contains the needed info:
- core
- INVALID_HASH
- /index.php
- /version.php
- In the ownCloud core (that is, the ownCloud server itself) the files “index.php” and “version.php” do have the wrong version.
and the solution:
- Upload the correct “index.php” and “version.php” files from e.g. the archive of your ownCloud version.
You can download the archive with the correct .htaccess file from here: Changelog - ownCloud