I'm getting this when I try to access this tool from the development version of canvas.docker. Canvas docker also has a SSL certificate installed. I've used Werkzeug on the pylti1.3-django-example app.
I'm runing the Django app like this (no docker):
python manage.py runserver_plus --cert-file cert.pem --key-file key.pem 9001
I get the following, I feel like I'm missing something really basic but I'm stuck on this one.
