err: /File[/var/lib/puppet/lib]: Failed to generate additional resources using 'eval_generate': Error 400 on SERVER: Not authorized to call search on /file_metadata/plugins with {:ignore=>[".svn", "CVS", ".git"], :recurse=>true, :checksum_type=>"md5", :links=>"manage"}
err: /File[/var/lib/puppet/lib]: Could not evaluate: Error 400 on SERVER: Not authorized to call find on /file_metadata/plugins Could not retrieve file metadata for puppet://example.com/plugins: Error 400 on SERVER: Not authorized to call find on /file_metadata/plugins
What exactly causes this error, and how to fix it?