I've installed Kali on a crypted root filesystem like I did before with ubuntu. Unfortunetly Kali is not able to mount the sd card, where the luks key is stored on, during boot. Boot ends in an initramfs shell. I'm able to boot the system by typing:

cryptsetup luksOpen /dev/sdxy vgname
lvm vgchange -ay

Trying to mount the sd card manually fails also with the errormessage mount: mounting /dev/sdxy on /keytmp failed: No such file or directory
ls on device and folder shows that both are existing. I don't understand this errormessage, as everything is there. With ubuntu it works.

Any suggestions what is going wrong?