My computer stopped working so I'm plugging the hard drive with a USB adapter to another computer to recover my files. After plugging it the passphrase prompt appears to unlock the volume, I type the passphrase and get this: "Unable to mount Encrypted Drive: The unlocked device does not have a recognizable file system on it."
The passphrase is correct. The drive was encrypted using the Debian installation. The GRUB partition mounts ok.