Proxy dash on twisted using nginx results in "Error loading layout"
This question has been asked over on the Plot.ly forums, I had some success with this issue by changing some of the settings slightly from what you tried:
app.config.update({# remove the default of '/''routes_pathname_prefix': '',# remove the default of '/''requests_pathname_prefix': ''})
More info available here: https://community.plot.ly/t/hosting-multiple-dash-apps-with-uwsgi-nginx/6758/2