I contacted their online 24/7 support chat (supposedly with a live agent) and here is the response:
Mary , I apologies for the inconvenience caused to you, we are facing the issue with the DVR and our teams are working to resolve the issue as soon as possible .
When I asked about the shows that it tells me are inaccessible and the fact that this has been going on for the last 4 weeks off and on and my DVR just decides to reboot 4 to 6 times a day up until today which it has been happening all day and with programs recorded tonight and previously all inaccessible and the response was:
I understand your issue your previous recoding will not be impacted .and our teams are working to solve the issue as soon as possible, we appreciate your patience and understanding in this matter.