welcome to the forum,
without using rclone, can you access the smb share?
check out my howto guide about smb/samba
https://forum.rclone.org/t/how-to-access-smb-samba-with-rclone/42754
better to test using a simple command, instead of rclone mount
can you please post the full output of rclone lsd AFS_SMB: -vv