ERROR: Could not find a valid gem 'simple_form-materialize'

[modusss]

When I tried to install shows this message:

ERROR: Could not find a valid gem 'simple_form-materialize'
ERROR: Possible alternatives: simple_form_materialize

Then when I tried "simple_form_materialize" it can do.

[drevantonder]

Same problem here

[jeremiahlukus]

That is a different gem.

[foliwe]

same problem

[johnantoni]

Doing:

gem 'simple_form-materialize', :git => 'https://github.com/patricklindsay/simple_form-materialize.git'

Fixes this for me