Hey everyone,
I have updated my Seafile Server CE from version 7.1 to version 8.0. Now I have the problem that I can no longer access my Seafile webinterface. When I start the service with ./seahub start I get the message that Seahub was started successfully.
When I start Seahub with fastcgi I get the error Unknown command: ‘runfcgi’.
Type ‘manage.py help’ for usage.
I use Nginx as my webserver.
Hopefully you can help me 
Have you seen this? Upgrade notes for 8.0.x - Seafile Admin Manual There are instructions there about extra steps you need to do when you upgrade to 8.0.
You probably want to make it a habit to look at the release notes Seafile Community Edition - Seafile Admin Manual before installing an upgrade since there might occasionally be some extra manual step. If there’s lots of manual steps it will get it’s own page (like that first link) and will be linked from the release notes.