I have a WD 2 TB drive that when trying to right click > decrypt, I get the error message "An internal error has occurred." When trying to decrypt through terminal, I get as far as it asking me for a password but not letting me type anything, just gives me the little keychain icon. I'm assuming this is a blind password? I type in the pw and the image attached error is what I get.
Running on MacBook Pro 10.13.6 High Sierra.