I tried nanodroid full, nanodroid fdroid and nanodroid microg, same error in both recovery and magisk.
Arch "i686" is not supported.
There are only 2 working roms for this tablet (GT-5210) one is CM13 and the other one is LOS14.1, I tried to install packages in both of them, no luck.
I also tried LOS14.1 + Magisk + Installing the MicroGapps APK from their site, it doesn't work.
How i got here: Tablet is painfully unusable with Gapps, there's really no point on trying to use it with them.... so I discovered microg, alI want is to get microg working so I can use play books and YouTube, and maybe some other apps that need google or is from them.