How to fix “Your Ruby version is 2.3.0, but your Gemfile specified 2.2.5” while server starting

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You better install Ruby 2.2.5 for compatibility. The Ruby version in your local machine is different from the one declared in Gemfile.

If you’re using rvm:

rvm install 2.2.5
rvm use 2.2.5

else if you’re using rbenv:

rbenv install 2.2.5
rbenv local 2.2.5

else if you can not change ruby version by rbenv,
read here

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