svn: PROPFIND request failed on '/projectpath'
svn: PROPFIND of '/projectpath': 301 Moved Permanently

It means your httpd.conf is misconfigured. Usually this error happens when you've defined the Subversion virtual "location" to exist within two different scopes at the same time.

I'm chasing this "Insufficient permissions to access /" error for hours in my trac project.

I've googled but so far didn't find any solution yet.

I'll update as soon as I resolve this problem.

UPDATE