(GitHubAddon) is not a valid add-on repository

I am running home assistant os as a virtual machine on a qnap nas
Home Assistant 2023.7.3
Supervisor 2023.12.0
Operating System 11.2
Frontend 20230705.1 - latest
I have been trying to add some features to my setup, linking to my smart meter and linking to my music server. The two add-ons I have been trying are
Music Assistant
and
Hildebrand Glow

Previously I have had success with two other add-ons from repositories.
I have searched here and on Google and Reddit, I think it might have to do with DNS or other network settings
After some time of messing about my home network was running on 192.168.9.xxx, this recently caused a problem and I reverted to 192.168.1.xxx
I’m not sure if this is a problem with my network settings, or if anyone else is having trouble with add-ons and I just need to wait for an update. Any assistant would be appreciated!