Starting with Android 9, Google introduced . Some devices reject any modification to the boot partition unless you also disable verity/verification.
If your TWRP version is several years old, it may simply be incompatible with Magisk 25.0+. Download the latest build for your specific device model from the official TWRP website or a reputable forum like XDA Developers. Method 3: Clean Wipe and Factory Reset magisk error 1
Once you've fixed Error 1, avoid it happening again: Starting with Android 9, Google introduced
Magisk Error 1 is a common issue that occurs when Magisk fails to install or update on an Android device. The error is usually indicated by a message that says "Installation failed" or "Update failed" with an error code of 1. This error can prevent users from rooting their device or updating Magisk to the latest version. Download the latest build for your specific device
