Yes please open an issue on github. Do not forget to mention the ruby version, the environment (dev or prod) as well as the logs when you hit the export button. thanks !
The bug has been solved, it was about the server configuration not about loco :)
For those who would encounter the same problem it has to do about the config file /environnement/production.rb and more precisely the x_senfile_header option.
Locomotive::Application.configure do #......... # Specifies the header that your server uses for sending files config.action_dispatch.x_sendfile_header = "X-Sendfile"
# For nginx: # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect'
# If you have no front-end server that supports something like X-Sendfile, # just comment this out and Rails will serve the files #......... end
It seems that for me I had to comment the line altogether to make it work. mariovisic suggested that I probably have to activate it in apache first to make it work, I'll investigate that later, for the moment as long as it works it's ok for me :)