cannot load such file -- rack/showexceptions (LoadError)
A Google search shows that it's a known issue in Sinatra (https://github.com/sinatra/sinatra/issues/1055) and can be fixed by updating to 2.0.0.rc1. However, sns_endpoint isn't being maintained anymore. I'd propose either adding the source to this repository, forking sns_endpoint, or replacing it with the official amazon SDK.
Exception:
A Google search shows that it's a known issue in Sinatra (https://github.com/sinatra/sinatra/issues/1055) and can be fixed by updating to 2.0.0.rc1. However, sns_endpoint isn't being maintained anymore. I'd propose either adding the source to this repository, forking sns_endpoint, or replacing it with the official amazon SDK.