Session expire with varnish installed

[proy2001]

Hello, I have installed it in magento version 2.3.0 with varnish nintalled in it.
Everything works fine but I can’t add any products other than the page1. It gives error ‘your session has expired’.
When I clear the varnish cache, it works again for few hours but start the session issue again.
Attach is a screenshot. Could you please check this issue.

[acharrex]

Thanks for your ticket.
Feel free to fork this repo and submit a pull request.

[0x15f]

I had a similar issue @proy2001 , I switched from using Redis to store sessions to the filesystem and it fixed the issue. Redis Sessions + Varnish/Fastly do not mix well.