From Planet Computers
→Rooted Android notes
If you choose to flash the rooted Android firmware, remember that you will have to complete the process by installing [https://magiskmanager.com/ Magisk Manager] using the following steps.
# Allow the installation of unknown applications# Navigate to https://magiskmanager.com# Scroll down to 'Download Magisk Manager'. Click on the download button and install the application.
# Open the application. If you arre running the app in a non-rooted Android you will see the error 'Magisk is not installed'.
# When asked about Additional Setup, Tap on Yes and let the process complete.