This might be off thread. Apologies if it is. I've just completed a dual boot installation, with Rooted Android, which certainly did not go according to the Flashing Guide notes, but finally worked. Now I've come to the part about Magisk. All went well, more or less, until step 4 (Open the application. Magisk Manager???). I get the error message "Magisk is not installed". According to the notes I should go to step 5 "when asked about Additional Setup, tap on Yes and let the process complete". Except, there is nothing asked, so nothing to reply yes to. I gather a box should come up for downloading the Magisk setup zip, but there's no information as to how to get there.