Redmine

Hi,

I am new to Ruby/redmine. I have installed redmine but cannot run because of below error.

"Ruby on Rails application could not be started
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:
cannot load such file -- activities_helper
Exception class:
LoadError
Application root:
/var/www/html/redmine"

I checked various forums but did not get any solution.

Please help.

Thank u!!