Write Secure Settings Permission

To use this, Tasker needs to be granted permission to Write Secure Settings on your device

Easy Way

Install the Tasker Permissions app and follow the prompts.

Hard Way (don't bother with this if you were able to do it the easy way)

  1. Setup ADB on your PC as described here.
  2. Use these commands: 
    adb shell pm grant net.dinglisch.android.taskerm android.permission.WRITE_SECURE_SETTINGS
    If you're on a mac write 
    ./adb shell pm grant net.dinglisch.android.taskerm android.permission.WRITE_SECURE_SETTINGS

    3. Note: On MIUI devices you may have to open developer options and enable the USB debugging (Security Settings) setting (and the Disable permission Monitoring setting in some cases) to be able to run the above command.