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@SDR-1970 no need to access developer options if you haven't changed anything there. Just clear the cached data and restart your device.
I would suggest a software repair using Xperia Companion instead of a factory reset, as a fresh OS is installed this way. If you select allow, that's just giving a permission for it to access contacts if the app needs.
@SDR-1970 Really sorry to hear that, in this case you could ask a friend to help you out or visit your Local support and let them repair.