As described here: https://www.snbforums.com/threads/solved-how-to-mount-cifs.60724/ - (not solved despite the change in thread title).
It appears that 384.14 is missing cifs.ko (and maybe other components), required to mount cifs1 & 2.
Issuing a "modprobe cifs" returns "modprobe: module cifs not found in modules.dep".
Cifs was working on 384.13.
What router model?