I am struggling with the very same thing. New Shield and PMS install and set up. I actually had it working for a VERY brief time until the server could not be located any more. After much effort, I tried a factory reset as original poster did. Several factory resets later, still stuck on “…starting for the first time”. Funny part is that prior to each factory reset, I go ahead and completely uninstall both Plex player and Server. After a few of the resets, not all, each still seem to be there. Not sure about that.
I have a Toshiba 4TB external drive attached to the Shield as “Removeable Storage” It does have media files on it. As you know, the Shield puts a “Nvidia Shield” folder in external drive. Additionally, there is an “Android” folder created as well. At any rate. before my factory resets, I delete all folders and files that are not my original media files. Thinking that might help. It does not. Any help would be appreciated for me and original poster. I am pulling my hair out at this new Shield and already regretting trying to replace a PC as a PMS.
