You can download the latest version of Magisk (13.3) from the XDA-Developers forum or simply update it on your device via Magisk Manager.
Bad news for all you Magisk users out there. Google’s SafetyNet has detected the latest version Magisk (13.2). This means that when you open up Pokemon GO on your rooted device, for example, you’ll see an error message and won’t be able to play the game.
Before you get too frustrated, let me give you some good news. Magisk’s developer topjohnwu has said that he’s working to fix the problem and get things back to the way they were before soon. When exactly will that happen is anyone’s guess right now, topjohnwu didn’t share a specific time frame.
Video: How to use Magisk to play Pokémon Go on rooted devices
If you’re feeling impatient, you’ll be happy to hear that there is a fix available that you can use right away. However, it does have its share of problems. It might result in an unexpected behavior and has to be done every time you reboot the device. Those of you who want to try it out can check out the instructions a user that goes by the name of Tobi@s has posted on the XDA-Developers forum via the button below.
Alternatively, you can just wait for the update from the developer, which will have things back to normal without any of the issues mentioned above.