So my advice would be to connect the TV using a wired LAN connection to verify if that resolves the issue. In particular if you are making use of wireless repeaters or wireless bridges. Type Plex on the Search bar, then select Plex from the suggested search results. Click Find on your Fire Stick home screen. Installing this app on FireStick is relatively easy. Remember also that if the TV is connected through a WiFi connection to your home network, you can expect these type of PnP protocol based applications to encounter connectivity issues. Plex is an official app available for direct download on Amazon App Store. Search for Plex (it’ll be the first result), and select it. So select the network interface on which the TV is found. How to Install the Plex Client on Your Fire TV To get started with Plex on your Fire TV, simply fire up your device and select the Search menu at the top of the left hand navigation bar. If your server has multiple network interfaces, the PLEX server must know to which network interface it should bind. Note that you must click the Show Advanced button on the top right corner to see this setting option. Next, I suggest you verify the correct Ethernet option is selected in the PLEX Server settings under >.

This will force the app to initiate the server discovery and registration process. Hi believe the first step you should take is to delete the Cache and Data for the PLEX app under HOME >.

My fire plex on firestick