We downloaded and tried 14.2.4815.1101 and saw the same errors.
We're seeing errors in the loadstate.log file
2019-10-10 09:02:16, Error [0x0802dd] InitializeCatalog: failed to open catalog.mig object.[gle=0x000000cb]
2019-10-10 09:02:16, Error [0x000000] Unable to open store at I:\SHARE\USERS\xxxxx\USMT\usmtmig\6NKRQ72\USMT\USMT.MIG:
class Mig::SideAwareWin32Exception: CLibTransport::OpenObject - cannot find requested stream!: The system cannot find the file specified.
[0x00000002] void __cdecl Mig::CMediaManager::InitializeCatalog(class Mig::CDeviceProgressAdapter *)
class UnBCL::Stream *__cdecl Mig::CLibTransport::OpenObject(const unsigned short *,class Mig::CDeviceProgressAdapter *)[gle=0x000000cb]
2019-10-10 09:02:16, Error [0x000000] Failed to select store. Path: I:\SHARE\USERS\xxxxx\USMT\usmtmig\6NKRQ72[gle=0x000000cb]
2019-10-10 09:02:16, Warning [0x000000] Internal error 15 was translated to a default error
2019-10-10 09:02:16, Info [0x000000] Failed.[gle=0x00000091]
2019-10-10 09:02:16, Info [0x000000] An error occurred during store access[gle=0x00000091]
2019-10-10 09:02:16, Info [0x000000] USMT Completed at 2019/10/10:09:02:16.409[gle=0x00000091]
2019-10-10 09:02:16, Info [0x000000] ----------------------------------- USMT ERROR SUMMARY -----------------------------------
2019-10-10 09:02:16, Info [0x000000] * USMT error code 38:
2019-10-10 09:02:16, Info [0x000000] +-----------------------------------------------------------------------------------------
2019-10-10 09:02:16, Info [0x000000] | An error occurred during store access
2019-10-10 09:02:16, Info [0x000000] +-----------------------------------------------------------------------------------------