There’s a fix for that. Login via ssh and run the following command
wget -O /opt/musicbox/startup.sh https://raw.githubusercontent.com/pimusicbox/pimusicbox/develop/filechanges/opt/musicbox/startup.sh
Then add the following new config setting under the existing mount settings in /boot/config/settings.ini.
mount_options = vers=1.0
1.0 should work but you may find you need to be use 2.0. Seems to depend on your SMB server.