Errno::EACCESS: Permission denied @ dir_s_mkdir

Try sudo chown -R jeremy $HOME/.rbenv -- it looks like you have a permissions issue. In the future, only run rbenv as yourself, e.g. no sudo.

refer to this github issue, https://github.com/bundler/bundler/issues/4590, you might need to remove the ~/.bundle sudo mv ~/.bundle /tmp then try to create the application again