Brodric I read your link " How to get through firewalls for Bridge streaming" from 10 months ago, right through, three times. It explains how to use “Windows Defender Firewall” and I have an Apple Mac.
I read the article linked to it “How to setup JRiver and the Bridge” and this hasn’t helped me either.
Today I get the message “connection failed” when attempting to connect to the NAS. I get a message “There was a problem connecting to the server DiskStation.”
I guess I need to go through a step by step article for this sort of thing. My main job is far removed from computer networking.