Redmine

Hi,

I install redmine in a debian 8 but when I want to access to the web page, I have the error "We're sorry, but something went wrong." and in the apache error.log file there is some error.
(I can access to redmine by $IP:3000 when I launch webrick)

Redmine 3.3.1
RubyGems Environment:
  - RUBYGEMS VERSION: 2.5.2
  - RUBY VERSION: 2.3.3 (2016-11-21 patchlevel 222) [i686-linux]
  - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/2.3.0
  - USER INSTALLATION DIRECTORY: /root/.gem/ruby/2.3.0
  - RUBY EXECUTABLE: /usr/local/bin/ruby
  - EXECUTABLE DIRECTORY: /usr/local/bin
  - SPEC CACHE DIRECTORY: /root/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /usr/local/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-linux
  - GEM PATHS:
     - /usr/local/lib/ruby/gems/2.3.0
     - /root/.gem/ruby/2.3.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin

thanks for your help