In this post, you’ll learn more about the Error FVE_E_WRONG_SYSTEM_FS – 0x8031002B that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_WRONG_SYSTEM_FS – 0x8031002B
Win32 COM Error Error Description
BitLocker Drive Encryption operating system drives must be formatted with the NTFS file system in order to be encrypted. Convert the drive to NTFS, and then turn on BitLocker.