Redmine

I'm get 500 error when open view differences of any revision.

Using:

Redmine 2.1.0.stable
Ruby 1.9.3
Rails 3.2.8
Apache with Passenger
Subversion 1.7.6

production.log:

Read fragment views/repositories/diff/21/9cae6dde2c1c0bc9f17ad7fc5b7cec24 (0.1ms)
Read fragment views/repositories/diff/21/9cae6dde2c1c0bc9f17ad7fc5b7cec24 (0.2ms)
Rendered common/_diff.html.erb (403.0ms)
Write fragment views/repositories/diff/21/9cae6dde2c1c0bc9f17ad7fc5b7cec24 (3.1ms)
Rendered repositories/diff.html.erb within layouts/base (9835.6ms)
Completed 500 Internal Server Error in 10336ms

ActionView::Template::Error (Permission denied - /var/www/redmine/tmp/cache/5D5):
13: </p>
14: <% end >
15:
16: < cache(@cache_key) do ->
17: <= render :partial => 'common/diff', :locals => {:diff => @diff, :diff_type => @diff_type} >
18: < end -%>
19:
app/views/repositories/diff.html.erb:16:in `_app_views_repositories_diff_html_erb__277427888_87309690'