无法在AWS Cloud9 CodeStar EB dev Ruby on Rails环境中运行rails console / server

I created my first environment with CodeStar and selected the Ruby on Rails w/ Elastic Beanstalk option. I'm using AWS Cloud9 for the IDE. I'd like to use the Preview option to view the impact of code changes prior to committing, and have looked through the docs at I created my first environment with CodeStar an