In this post, you’ll learn more about the Error FVE_E_CONV_READ – 0x8031001B that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_CONV_READ – 0x8031001B
Win32 COM Error Error Description
A read operation failed while converting the drive. The drive was not converted. Please re-enable BitLocker.