Can no longer mount SMB share on Linux (Raspberry Pi) after upgrading to Monterey

I just updated my iMac from Catalina to Monterey.

I was sharing a folder over SMB, and was previously able to mount this from a Raspberry Pi with a line like this in my fstab file:

//<MacName>.local/Movies /mnt/Movies cifs username=<Mac Username>,password=<Mac Password>,x-systemd.automount

This now gives this error

mount error(13): Permission denied
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

I have tried disabling re-enabling File Sharing and I've ensured that the Windows File Sharing option is with my user enabled for SMB:

Has anything changed regarding this in Monterey (or Big Sur, as I skipped that upgrade), and is there anything I need to do to allow this to work again?