Devise: Devise 4.3.0 does not work install on Rails 5.1.2

[BimaPanduW]

I've tried to perform
rails generate devise:install
but i got this

Running via Spring preloader in process 5177
Could not find generator 'devise:install'. Maybe you meant 'assets', 'generator' or 'coffee:assets'
Run `rails generate --help` for more options.

any way to solve this problem?

[rafaelfranca]

please try to run spring stop after adding devise to your Gemfile

[BimaPanduW]

this problem was solved. I forgot to add gem 'devise' in gemfile

[arun2github]

I am getting this issue please help
$ rails g device:install
/usr/local/lib/ruby/2.7.0/x86_64-linux/stringio.so: warning: already initialized constant StringIO::VERSION
Running via Spring preloader in process 6989
Could not find generator 'device:install'.
Run rails generate --help for more options.
.....
i tried spring stop but didnot work.