I am constantly getting these errors on my two mini vox's. My main DVR is a Bolt +. I used to get a similar network error code on my mini's when I used Moca and was on the old version 3 TiVo OS. I switched over to Ethernet and I was error free for a long time on the version 3 OS. Now I am on Hydra 4.0 and now this error is occurring a few times a week. The TiVo site says. This error is displayed when you are using Multi-Room Streaming and the Ethernet connection on your network is interrupted due to a network problem, the device is unplugged or restarted. I was getting these errors when I was using Google WiFi mesh routers. I have since replaced my router with a Netgear Orbi mesh system and I also took the opportunity to replace my network switch with a new one from Netgear also. I did this not because of the TiVo errors but I wanted a better WiFi system. The v874 errors continue. My main DVR was replaced a few months ago because the original one stopped booting up. But I was getting these errors on the old DVR too. I'ts not a cabling issue as I have rewired my house with new cat5e Ethernet cables and new RG6 coax runs to each room. I'm not sure what is causing the issue. I am on FiOS and I don't have a POE filter on the ONT but maybe I do need one. The ONT was replaced last month too after I upgraded to gigabit speeds with Verizon.