Redmine install following: http://www.redmine.org/projects/redmine/wiki/HowTo_Install_Redmine_231_On_Ubuntu_1204_with_git_and_Redmine_Git_Hosting_plugin

redmine-home

Ruby (Rack) application could not be started
A source file that the application requires, is missing.

    It is possible that you didn't upload your application files correctly. Please check whether all your application files are uploaded.
    A required library may not installed. Please install all libraries that this application requires.

Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem.

Error message:
    no such file to load -- bundler
Exception class:
    LoadError
Application root:
    /srv/redmine 
Backtrace:
    # 	File 	Line 	Location
    0 	/usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb 	36 	in `gem_original_require'
    1 	/usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb 	36 	in `require'
    2 	/usr/lib/ruby/vendor_ruby/phusion_passenger/utils.rb 	325 	in `prepare_app_process'
    3 	/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/application_spawner.rb 	156 	in `initialize_server'
    4 	/usr/lib/ruby/vendor_ruby/phusion_passenger/utils.rb 	572 	in `report_app_init_status'
    5 	/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/application_spawner.rb 	154 	in `initialize_server'
    6 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server.rb 	204 	in `start_synchronously'
    7 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server.rb 	180 	in `start'
    8 	/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/application_spawner.rb 	129 	in `start'
    9 	/usr/lib/ruby/vendor_ruby/phusion_passenger/spawn_manager.rb 	253 	in `spawn_rack_application'
    10 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server_collection.rb 	132 	in `lookup_or_add'
    11 	/usr/lib/ruby/vendor_ruby/phusion_passenger/spawn_manager.rb 	246 	in `spawn_rack_application'
    12 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server_collection.rb 	82 	in `synchronize'
    13 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server_collection.rb 	79 	in `synchronize'
    14 	/usr/lib/ruby/vendor_ruby/phusion_passenger/spawn_manager.rb 	244 	in `spawn_rack_application'
    15 	/usr/lib/ruby/vendor_ruby/phusion_passenger/spawn_manager.rb 	137 	in `spawn_application'
    16 	/usr/lib/ruby/vendor_ruby/phusion_passenger/spawn_manager.rb 	275 	in `handle_spawn_application'
    17 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server.rb 	357 	in `__send__'
    18 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server.rb 	357 	in `server_main_loop'
    19 	/usr/lib/ruby/vendor_ruby/phusion_passenger/abstract_server.rb 	206 	in `start_synchronously'
    20 	/usr/share/phusion-passenger/helper-scripts/passenger-spawn-server 	99 	

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