need help with Permission denied

[Banaanhangwagen]

Make sure that the hash in bitlocker.txt is formatted exactly as stated here https://hashcat.net/wiki/doku.php?id=example_hashes, and it will work.

Note that you copy-pasted a complete JtR-command in the txt. Only the hash is needed.
Note that Hashcat is only compatible with $bitlocker$1$, and your hash mentions $bitlocker$2$.