I am Encounter some problem after 4 or 5 days.
I can say that the method and the twrp is working. the only things at first I found it hard to follow all the steps (especially about go to "wipe - format data") I do format the data and wipe entire system., kinda newby in this rooting things (but I take the risk to gain that knowledge).
I think its succed after almost 5 hours struggling with the method on installing twrp into my device. after my phone boot, I go install magisk manager, and download magisk .zip file. (because inside the magisk manager I saw that magisk frame isnt install yet)
and I go back to twrp mode and flash magisk.zip file and them recovery boot.
somehow I succeed rooting my device. everything just going fine until last night I forgot to charge my phone and my phone run out of power, I connect my charge, the phone is charging just fine. but when I boot up the phone, the problem come. my phone keep restarting over and over again. all over the night. till I go back to twrp and reboot into system. if I reboot into recovery the phone keep restarting.
while I am typing this, I was retry the same proccess above, and now everything just fine. my phone are running again in recovery mode. magisk are also installed already. will update again if the problem or other problem appears again, if no update then it's mean everything just fine.
---------- Post added at 05:07 PM ---------- Previous post was at 04:52 PM ----------
Run into same issue here, but I give it a try and retry to flash the twrp again, but this time with proper steps. first time I am kinda forget about installing the disabler, (disabler should be flash right after wipe all data, but in my case.. I install it after so many things I already did after my phone turn on :crying::crying

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Wipe all the data (Wipe - Format Data, inside the twrp mode) and then make sure you flash the disabler. important to you arent by an accident touch boot into the system. once you boot into the system your recovery mode will error and the auto restart will keep going.