My Store and xbox stopped working. So I clicked on Dell Help. Got message it stopped working but no way to fix. I had seen online that sometimes "store" stopped because of Win 10 updates. I removed the latest update and rebooted. I got back Store and Xbox but not Dell Help. I still says "failed to connect to the service".
It is possible the site was down. Did you try rebooting and trying again to connect? Have you performed any Dell Updates to see if that will resolve the services? If not, try the Dell Updates..