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When I was installing refinery 3.0.0, at the end of the bundle process the error:

NoMethodError: undefined method `spec' for nil:NilClass
An error occurred while installing refinerycms-core (3.0.0), and Bundler cannot continue.

was shown.

Cris R
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1 Answers1

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The solution was to install the latest version of bundler:

gem install bundle

I hope it helps

Cris R
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  • Personally, I think the issue would be fixed by `gem cleanup bundler`, but Cris' solution is also valid. – Kieran E Dec 18 '15 at 22:46