Problem installing Capistrano

I am following Chris's "Deploy Ruby on Rails on ubuntu 18.04 ..." But I am stuck at installing Capistrano! command "cap install STAGES=production" gives me the following error :

":$~ cap install STAGES=production
(Backtrace restricted to imported tasks)
cap aborted!
LoadError: cannot load such file -- /usr/lib/ruby/vendor_ruby/Capfile

(See full trace by running task with --trace)"

Can anyone help me with this. I tried all solutions on web, without success.
thanks

Strange, maybe try bundle exec cap install STAGES=production?

Thanks. It worked!

Yay! I had the same issue and that worked for me as well. Thanks

Yes! it worked for me also!