The Server value you are using is not in the right format.
This is the domain name (FQDN) or IP address of the storage server you want to connect to
It should just be an IP address, like 192.168.1.1 or whatever your internal IP address is, or a host name. smb:// is not needed, that is configured in the “Protocol” selection.
The share name (Krynn?) should go in the “Remote share” field that is below the screenshot.
You can see the actual mount error in host logs by going to Settings → System → Logs, or and choosing “HOST” from the top right menu, or by running command host logs in the CLI.
The logs are incomplete, and please post them as text, not a screenshot. There should be some messages about mount errors, which don’t seem to be shown.
I believe the share also requires a username and password. At least, that’s the only way I could use it.