Reading backup from a bitlocker drive

I made a backup of my main ssd drive to an external hd drive crypted with bitlocker. no problem until this point.
The problem is that, when I load the recovery console from a bootble usb drive I created with Paragon it cannot access the bitlocked external drive (and all my external drive are bitlocked), hence the backup. How do I solve this?

You can do that over the CMD

Example:
Unlock with password

Input:
manage-bde.exe F: -unlock -pw

F stands for my drive