Not sure whether others have had the same issue, when I upgraded from the official Libreelec 8.2.2 to:
Generic.x86_64-devel-20180104223802-#0104-gf7875a1
the dvb_core, dvbdev and SAA716x Budget drivers do not load.
The good news, with LE9 was I was able to access Prime Video through the adaptive inputstream, as I could not get Prime Video to work with Chromium on 8.2.2. Hence it would be good to be able to migrate to the LE9 dev build.
Happy to load any debug info required.
Cheers