When I try running rails console I get this error:
rails console
/Users/TuzsNewMacBook/.rvm/gems/ruby-2.3.7/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_
Yes, the best answer is to reinstall.
You can get the version easily by typing:
ruby -v
With rbenv, the command is i.e.:
rbenv
rbenv install 2.3.7
with rvm:
rvm
rvm reinstall 2.3.7