You have flashed Systemless SuperSu*? Could cause trouble from what I read on Google.
When I got my hands on this tablet last week, it was running on Android 4.0.2, I think.
Then I tried to install some Roms such as Lineage 13 and Slim. The only one that worked was "Slim-p3100-4.4.4.build.9.4-UNOFFICIAL".
The recovery that I was using said something about "restore root access" (I really can't remember if it was exactly this) when I was going to reboot, I choose "Yes" but it was only 2 days ago that I opened SuperSu for the first time and it was saying "binary occupied", then I did the root following this thread.