Redmine requires bundler 1.5.0 or higher

Question

I am trying to set up RedMine on Ubuntu 14.04.5 LTS machine and in the end of install have following error:

Redmine requires Bundler 1.5.0 or higher (you're using 1.3.5).
Please update with 'gem update bundler'. (SystemExit)

However, gem update bundler gives me following:

gem update bundler
Updating installed gems
Nothing to update

Moreover:

$ bundle -v
Bundler version 1.15.3

$ gem list | grep bundler
bundler (1.15.3)

I am totally stuck. Could anybody tell me how to fix it? I've tried to remove Bundler version check in Gemfile. Then I have following error:

`x64_mingw` is not a valid platform. The available options are: [:ruby, :ruby_18, :ruby_19, :ruby_20, :mri, :mri_18, :mri_19, :mri_20, :rbx, :jruby, :mswin, :mingw, :mingw_18, :mingw_19, :mingw_20] (Bundler::GemfileError)

I've checked solutions here: http://www.redmine.org/issues/19409 and here http://www.redmine.org/issues/19469 - nothing helps... After this steps: Redmine installation : Error I have cannot load such file -- bundler/setup (LoadError) error. But bundler is installed and still have version 1.15.3 Please help. I am totally disappointed with these errors.

Sorry for my english.

Answer 1

Try

bundle clean

to remove all bundled gems

Then

bundle install

to install required gems

Edit:

After seeing your new error, look at this answer:

'x64_mingw' is not a valid platform

And this RedMine board post:

http://www.redmine.org/boards/2/topics/45759

An updated bundler gem should be ok, but also check your Gemfile and remove any reference to x64_mingw before running bundle install