[Errno 13] Permission denied when adding bazaar repository

[Jasper]

I am trying to add a bazaar repository to reviewboard, but get this error message:
Permission denied: "/[path-to-project]/.bzr/branch-format": [Errno 13] Permission denied: u'[path-to-project]/.bzr/branch-format'

Our bazaar repository is accessed via a NFS mount. When I cat the branch-format file in a terminal the content is shown.

When I try to add a local repository it works fine and the review requests are created.

Are there perhaps system users used by Reviewboard that needs to be in the same group as the files in our repository?

Thanks,
Jasper

[Jasper]

After playing around with user permissions, it seems that running the webserver as a group with enough permissions for the repository is working.