fix for big sur 11.2.2 download failure

how do I run the big sur 11.2.2 update?

The normal update fails after downloading.

I tried "sudo softwareupdate -ia". It failed miserably with

Failed to download & prepare update: Error Domain=SUMacControllerError Code=7723 "[SUMacControllerErrorPreflightPersonalizeFailed=7723] Failed to perform PreflightPersonalize operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_PACKAGE_FAILURE(29)_1_MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)]" UserInfo={NSUnderlyingError=0x7fb468804dd0 {Error Domain=MobileSoftwareUpdateErrorDomain Code=29 "Failed to verify package contents." UserInfo={NSLocalizedDescription=Failed to verify package contents., NSUnderlyingError=0x7fb468805540 {Error Domain=MobileSoftwareUpdateErrorDomain Code=7 "The file ./payloadv2/ecc_data/System/Library/Frameworks/CoreMediaIO.framework/Versions/A/Resources/AppleCamera.plugin/Contents/MacOS/AppleCamera could not be digested: 1" UserInfo={NSLocalizedDescription=The file ./payloadv2/ecc_data/System/Library/Frameworks/CoreMediaIO.framework/Versions/A/Resources/AppleCamera.plugin/Contents/MacOS/AppleCamera could not be digested: 1, target_update=20D80}}}}, SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPreflightPersonalizeFailed=7723] Failed to perform PreflightPersonalize operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_PACKAGE_FAILURE(29)_1_MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)], NSLocalizedDescription=Failed to personalize the software update. Please try again.}

I've been trying for 2 weeks to get this update.

What do I need to do?