Other things to try
Starting fresh
If you've been trying a lot of things and can't get Magisk to work properly it can be a good idea to start fresh. Start by uninstalling Magisk, flashing a clean boot image and installing Magisk again. If that doesn't work you could try wiping your device and starting out completely clean.Older versions of Magisk
It is possible that an older version of Magisk may work if the latest does not. This is a last resort and should be considered unsupported. If the latest version of Magisk doesn’t work, but an earlier version does, please help fixing the issue by reporting it with all the necessary details (also see "Asking for help/reporting bugs").Installation files for earlier releases of Magisk can be found on GitHub. If you need other versions, not available for download, the source code for these can be found in the same place, along with instructions on how to build Magisk.
Please note that there’s no guarantee that an older version of Magisk will work with the current Magisk app. Compatible apk releases can be found on GitHub.