Connection lost when create post

Sometime when you view your post or create new post, you get this warning message:

Can not get the available slot. Lost connect with your server.

The issue is with a cookie conflicting with our cache. You can push to staging (a completely clear cache environment) to resolve the issue, the error itself is indicative of a cookie error.

Please contact your hosting provider to manually clear cache each one to check which is causing the error.

Thank you.