Look for a line defining SU_BINARY_SEARCH and modify it to include additional directories where su might be located:

(Note: This may require a read/write system partition, which is rare on modern Android 12+ devices). Solution 3: Re-flash Magisk via Custom Recovery (TWRP)

In short: the required root management files are missing or inaccessible.

If you're running a custom ROM or firmware, it's possible that it's causing issues with the superuser binary. Try:

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