How to reset my cloud9 workspace and solve file creation error


Hello members. I am building a Saasapp with Ruby on Rails using cloud9 IDE. I have successfully built the homepage,about and finally building a contact form.After creating a new.html.erb file at app/views/contacts/new.html.erb, the file fails to save sometimes but finally saves.When i pull up the server so i can preview my app,the form does not shrink to col-md-4 as i wrote on the bootstrap div.

I get this error:' Cannot render console from! Allowed networks:, ::1, '

How can i solve this problem and how do i reset my workspace to have a Preview and Run buttons as mine doesn't have.I view my app by manually typing my app url at address bar.Please help,I really want to learn and build projects here at cloud9.Thank you.