RubyMine: Rails server launcher wasn't found in the project

Question

After importing an existing project into RubyMine, I encountered \"Rails server launcher wasn\'t found in the project\" when I Run/Edit Configuration.

I\'ve checked thi

Answer 1

The easiest way to fix it:

1. Close project
2. Remove .idea folder from project folder
3. Open project

Bingo!

NOTE: this workaround seems to no longer work with 2017.2. See RUBY-20144