We are running Moodle 1.9 without any issues
We upgraded our wiki to Nwiki and got the following errors:
- Can't see any of the wiki pages.
- error in log " File does not exist: /var/www/moodle/mod/mod, referer: http://moodle.sage.edu/mod/wiki/view.php?id=855"
- When you click on "history" Fatal error: Call to a member function page_name() on a non-object in .../persistence_manager.php on line 239
- All the data seems to be in the database.