dism /online /cleanup-image /restorehealth

 https://answers.microsoft.com/en-us/windows/forum/all/bitlocker-drive-preparation-tool-crashes-when/97de584e-e4ab-4dfa-8477-4e3ec1a5cdc7

C:\WINDOWS\system32>manage-bde -status c:

BitLocker Drive Encryption: Configuration Tool version 10.0.17763

Copyright (C) 2013 Microsoft Corporation. All rights reserved.

ERROR: The volume C: could not be opened by BitLocker.

This may be because the volume does not exist, or because it is not a valid

BitLocker volume.

C:\WINDOWS\system32>manage-bde -status h:

BitLocker Drive Encryption: Configuration Tool version 10.0.17763

Copyright (C) 2013 Microsoft Corporation. All rights reserved.

ERROR: The volume H: could not be opened by BitLocker.

This may be because the volume does not exist, or because it is not a valid

BitLocker volume.

C:\WINDOWS\system32>dism /online /cleanup-image /restorehealth

Deployment Image Servicing and Management tool

Version: 10.0.17763.1

Image Version: 10.0.17763.107

[==========================100.0%==========================] The restore operation completed successfully.

The operation completed successfully.

C:\WINDOWS\system32>