I’ve just got the same issue updating from 23.0.5 to 24.0.1 and this hack helped to finish the update. Thanks! It’s a shame that NC devs couldn’t fix this bug for 3 years.
This worked for me. Worth noting that I did NOT have a /data/updater-xxxxx/ directory.
It is as amarus describes. And the issue is, that you need to
- add the line after avery update in -htaccess
- and also delete the old update folder in data.