ok, perhaps it depends on BA (EU) or AA (global) ROM version? however you can boot the rooted one, install a downloaded version of magisk20 via magisk manager to patch your own kernel directly.
I flashed the 4.14.117-perf+.img that you uploaded...
Govtuner always inactive.I tried to reinstall it.any solution?
What I did was to flash the Uninstaller and then flash the previous version. 4.0.2