I'm old school, and I upload FLAC DSD MP3 files to my FIIO. I don't use a streaming platform like Spotify. I wouldn't know how to help you.

I had the same problem: the version of Tidal already installed is too old. Even if you update the firmware of the FIIO M9, the problem remains. You need to download the latest version of Tidal in apk format (apkpure.com), then copy the apk file to an SD card and update the Tidal app. Then it is good. You can connect to Tidal server and download your music. Good luck. Sorry for the mistakes : my language is french.