ERROR [Microservices:StorageService] Failed to read (/usr/src/app/upload/backups/.immich):

I am trying out immich as a permanant replacement for my and my families photos and got it up and running a few days ago without issue in docker. In the last 48 hours, watchtowerr did an automatic update on the immich_server container and since then the immich_server container won't start and after looking in portainer I am getting the following;

https://pastebin.com/X3H3zRs2

I have a proxmox ve node with debian 13, docker is installed inside debian and I have my NAS mounted as a CIFS share in fstab which is being used by other containers without issue. I have modified my portainer stack and ENV variables to have my library and other directories for immich residing on my NAS.

Portainer Stack: https://pastebin.com/Z5XXfFbS
ENV Variables: https://pastebin.com/B24pRsL4

I'd appreciate if those of you with some more knowledge could take a look and give me some troubleshooting tips.
What i've tried so far

Restarted all containers related to immich
Restarted debian and docker as well as the proxmox node.
manually created the sub directory "backups" within <UPLOAD_LOCATION>
Manually created the .immich file in <UPLOAD_LOCATION>/backups/.immich
Verified that the CIFS mount is functionining, i can rw to the directory via SSH in Debian.

portainer_logs2.02KB

Pastebin

Portainer logs for immich_server - Pastebin.com