Redmine

After updating to 1.3.0 I continue to get the following error when I access the calendar page (it works if I change language to english):

ActionView::TemplateError (incompatible character encodings: UTF-8 and ASCII-8BIT) on line #13 of app/views/calendars/show.html.erb:
10: </fieldset>
11: 
12: <p style="float:right;">
13:   <%= link_to_previous_month(@year, @month) %> | <%= link_to_next_month(@year, @month) %>
14: </p>
15: 
16: <p class="buttons">

    app/views/calendars/show.html.erb:13:in `concat'
    app/views/calendars/show.html.erb:13:in `block in _run_erb_app47views47calendars47show46html46erb'
    app/views/calendars/show.html.erb:3
    <internal:prelude>:10:in `synchronize'
    passenger (3.0.11) lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
    passenger (3.0.11) lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request'
    passenger (3.0.11) lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
    passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler'
    passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `block in handle_spawn_application'
    passenger (3.0.11) lib/phusion_passenger/utils.rb:479:in `safe_fork'
    passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application'
    passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
    passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
    passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:180:in `start'
    passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start'
    passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:219:in `block (2 levels) in spawn_rails_application'
    passenger (3.0.11) lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
    passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:214:in `block in spawn_rails_application'
    passenger (3.0.11) lib/phusion_passenger/abstract_server_collection.rb:82:in `block in synchronize'
    <internal:prelude>:10:in `synchronize'
    passenger (3.0.11) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
    passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application'
    passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application'
    passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
    passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
    passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
    passenger (3.0.11) helper-scripts/passenger-spawn-server:99:in `<main>'

Rendering /srv/www/applications/redmine/public/500.html (500 Internal Server Error)