Hi,
Thank you for writing to Microsoft Community Forums.
We understand the concern as BitLocker encryption is giving an error: The handle is invalid.
However, for concern/queries related to BitLocker encryption, let me help to point you in the right direction. I would suggest you to Ask a question in Q&A forum where you will find professionals with expertise on BitLocker Encryption and that would be the appropriate forum.
You may also refer these articles for additional information:
BitLocker Group Policy settings
Regards,
Aditya Roy
Microsoft Community – Moderator