The error “Windows RE cannot be enabled on a volume with BitLocker Drive Encryption Enabled” prevents you from enabling the Windows Recovery Environment. WinRE is ...
To fix the “Cannot install Windows, BitLocker Drive Encryption is enabled on selected partition” error, suspend BitLocker via Settings or Control Panel, or use your recovery key to unlock the drive.
Return to the BitLocker settings screen, and the status should indicate that your system drive is being encrypted. If you wish, you can resume working in Windows while the encryption runs, though ...