[Return code/value] FVE_E_CANNOT_ENCRYPT_NO_KEY 2150694958 (0x8031002E) [Description] 
No encryption key exists for the volume. Either disable key protectors by using the DisableKeyProtectors method, or use one of the following methods to specify key protectors for the volume: ProtectKeyWithExternalKey ProtectKeyWithNumericalPassword ProtectKeyWithTPM ProtectKeyWithTPMAndPIN ProtectKeyWithTPMAndPINAndStartupKey ProtectKeyWithTPMAndStartupKey