Can't update iPhone 12 Pro, error code 4000
purchased new iphone 12 pro, when connected to laptop itunes, it asks for update from 14.3 to 14.5.1, but then can not update, error code 4000
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See this discussion about iOS14 Error 4000 --> https://discussions.apple.com/thread/251804526
which was recommended by an Apple Community Specialist in this post --> https://discussions.apple.com/thread/252380437?answerId=254515885022#254515885022
Another solution by manually selecting the update file in WIndows:
https://discussions.apple.com/thread/252708257?answerId=255119643022#255119643022