Error installing rubyMine, no SDK specified, but it is listed

Question

Getting \"Could not install gems:no SDK specified\" when trying to run any command such as starting the rails server. Why am I getting this and how can I get around it?

Answer 1

I went into settings and an SDK was already listed, but it wasn't until I clicked 'update gems' that everything got installed ok. Then I was able to start and use the application fine.