When a new network is detected, you get the option to allow sharing (printers, folders etc). If you didn’t click the option the first time, how do you enable it?!
If you remove the created Host from with My Network Zones & try to use that network again, this should trigger the message you missed the first time.
If you have lots of Host entries in My Network Zones that are all the same, it is sometimes cleaner/easier to remove them all & use the process Stealth Ports Wizard to recreate just the one you need.
I hope that helps.