If you are encountering remote issues there are typically two causes:
1.) You need to repair the Apple TV remote with the Apple TV. Point your remote three inches away from your Apple TV. Then press and hold your remote's Menu and Volume Up buttons for five seconds. If asked, place your remote on top of Apple TV to complete pairing.
2.) Charge your Siri Remote or Apple TV Remote for 30 minutes using a Lightning to USB cable and a USB wall charger.
3. If Playlister/the remote seems to be frozen and you've done the top two, power cycle the Apple TV (unplug, and plug it back in)
P.S. here is the how-to guide for the Apple TV remote: