I answer to myself. This tutorial works perfect and I've repaired my tablet and installed Magisk:
I have installed twrp with "fastboot flash recovery twrp.img"
After I have done "fastboot reboot", and the tablet is continually restarting. It can't go to Android.
I can't get into recovery in any way. I can only access to fastbood mode.
Therefore I cannot use the tablet, nor...
I have a bug since I installed Renovate 14.1.
When I select Usb debugging in settings/developer options, it unchecks itself.
So, I can't activate Usb debugging.
Please could you check if you have this bug?
Any solution? I've googled it but I can't find it
Try Kernel TGPKernel.G95xx.v22.214.171.12480828.zip
It goes perfect in my S8. In Aroma installer say yes to install MTweaks and after installing, open mtwaeks app to choose best battery.
I install this kernel after installing ROM
I have a Samsung S8+ with Renovate Ice 13.4 which has Kernel NX.
I couldn't update Magisk to 17.1 because it frozen my touchscreen. But Magisk 16.7 worked perfect.
Now I have installed TGP Kernel 2.9.1 and Magisk 17.1 works perfect with my Samsung S8+.
Samsung S8+ with ROM Renovate Ice 13.4.
Installed Magisk 17.1
Screen frozen and I must restart with buttons.
Everything goes fine if I uninstall Magisk 17.1 and install 16.7.
There is a problem with the latest version.