Redmine

Hi,

I have not found this issue in the FAQ or by searching the forum. I hope this is not a duplicate.

I followed this How-To (3.0x on Ubunutu 14.04) step-by-step and it works as intended.
https://www.redmine.org/projects/redmine/wiki/HowTo_Install_Redmine_30x_on_Ubuntu_1404_with_Apache2_Phusion_Passenger_MySQL_Subversion_and_Git_%28Gitolite%29

I did this up to "Start Redmine" and had no issues:
https://www.redmine.org/projects/redmine/wiki/HowTo_Install_Redmine_30x_on_Ubuntu_1404_with_Apache2_Phusion_Passenger_MySQL_Subversion_and_Git_%28Gitolite%29#Start-Redmine

I have a clean useable version of Redmine now.
After that I stopped the server, made a snaphot and restarted it again. Then I tried to install new plugins but got the follwing error:

rake aborted!
cannot load such file -- bundler/setup
/opt/redmine/redmine-3.2.1/config/boot.rb:4:in `<top (required)>'
/opt/redmine/redmine-3.2.1/config/application.rb:1:in `<top (required)>'
/opt/redmine/redmine-3.2.1/Rakefile:5:in `<top (required)>'

Why is bundle no longer working? Did I do something wrong or am I missing a step?

After I installed bundle by "gem install bundler" I get this message:

Could not find rake-11.1.2 in any of the sources

Can someone tell me what I am doing wrong? I used rake and bundler during the installation of Redmine.
Why are they missing now?

I usually do not work with Ruby and the Google results for these errors are not really helping me. Most of them just tell me to that bundler/rake are not installed and I should install them.

Thanks for your support.