I do not understand the next return of heroku logs : I did a app in ruby on rails and work fine but when i up the app to heroku, they give me the next error and i realy don t know what thats mean [here is the photo of the error][1]and here[it is my page in localhosting][2],is my first question so if you need more information ask me please.


  


  [1]: https://i.stack.imgur.com/qJTJK.png
  [2]: https://i.stack.imgur.com/GKYom.png