Had the same issue... reboot using this method. Fixed it.[br]
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'''How To Hard Reset / Force Restart iPhone X:'''[br]
Step 1: Press the Volume Up button and then release, followed quickly by pressing and releasing the Volume Down button.[br]
Step 2: Now quickly press and hold the Side button until you see the device’s screen turn off, followed by the Apple logo showing up on the device.[br]
Step 3: Once the Apple logo appears on the screen, release the Side button to complete the force restart cycle.