I'm sure this doesn't apply to your install, but I've also run into this error and thought that I might document it in case someone else runs into the issue.
After pushing my code to a new machine, I started to receive this error. After thinking about how I'd set up session storage, I remembered that I'd enabled the following configuration:
ss.session.store.use('redis');
It turns out I had not installed redis and therefore the redis server wasn't available on the new box.
After I installed and started redis on the new box, the issue went away.
This most likely won't help you. But, I thought I would share the info anyway.
Good luck!