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You can try restarting your device and reinstalling the Amazon Music app. If these still not work, here are some other solutions: https://www.drmare.com/amazon-music/amazon-music-not-working.html

You can find some solutions in this post: How to Fix Amazon Music Not Working(https://www.audfree.com/amazon-music-tips/amazon-music-not-working-fixed.html)

You can first try searching ' Tidal' on your TV's 'Apps' section. If there is no anwser, then you can only listen to Tidal music on your TV by using AudFree Tidal Music Converter. It allows you to download Tidal music and play the downloaded music on your TV via a USB cable.

You can try update the Tidal app on your TV and then restart your TV. If this don't work, you can try using AudFree Tidal Music Downloader 

https://www.audfree.com/tidable/

to offline listen to Tidal music on your TV.

You can use AudFree Deezer Music Converter to download music from Deezer. Then you can put these downloaded music to a USB drive. You can play them by plugging this USB into your TV.

Still cannot solve? Try downloading Amazon Music songs by AudFree Amazon Music Converter. Then you can listen to Amazon Music offline on your TV.

First, check your Internet connection. Secondly, update the Spotify app on your TV. Thirdly, check your TV system updates. If these still work, you can try using AudFree Spotify Music Converter. Use it to download Spotify songs to a USB drive. Then you can plug this USB into your TV and listen to Spotify music without any issue.