Hi,
Per my experience, it may be due to the prerequisite:
We must install the August 10, 2021 SSU KB5005112 before installing the LCU KB5015811 (OS Build 17763.3165). We can add the prerequisite to have a try. Refer to:
July 12, 2022—KB5015811 (OS Build 17763.3165)
KB5005112: Servicing stack update for Windows 10, version 1809: August 10, 2021
August 10, 2021—KB5005030 (OS Build 17763.2114)
Hope it helps. Have a nice day!
Best regards,
Simon
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