Unfortunately, it's not solved:-( What I meant is that I've followed the procedure to install SlimROM 20200929 (but with 20201130, I had the same problem), suggested by you (I did it from scratch), but I faced the same Play Store crash during the initial boot, as before.
If you need any further tests to be executed, please let me know as I did TWRP backup of the ROM, so I can restore it.
One more I've just noticed - my model is not exactly N8000, but N8020-this is LTE version of the tablet. I'm not sure if it makes any difference.
I've done two more tests with your other ROMs - I'll provide my update here, to consolidate discussion/feedback in one place:
- I've installed RR ROM 20201130 - no error after inital boot (after full factory reset), but Google Play randomly disappears (no force close, but the window just disappears), applications installation from Play Store randomly fail (sometimes they install after 2nd attempt). Cleaning Play Services & Play Store data didn't help and reboot after doing this, didn't change anything. Problems "milder" than with Slim, but still annoying.
- I've installed your Lineage 16 (Android 9.0) 20201207 - works great! No error during initial boot (after factory reset). All applications installed from Play Store without any problem (also no errors). I'm running now some benchmarks to do a stress test of the system. PCMark was completed successfully. So far it runs quite good - I'll continue testing. Only Netflix is hidden in Play Store - I think the device fingerprint is not installed (contrary to RR & SlimROM).