There is a heap of issues on the archived forum from when upstream samba disabled smb1.
Something like this in your client smb.conf archived forum comment
[global]
...
server min protocol = NT1
...
If you get a prompt then you are having special chars interpreted by the mount command delimiters or another reserved character.
try surrounding your username and password with single qoutes like this
... -o username='myuser',password='mypass' ...
And yes you can make it work