Weird unfixable Vortex error popping up that says 'Failed to Update Master List' and proper steps did not remove this.

[UTLegend96]

As the title says, I've taken every step humanly possible to solve this and it's still popping up. It says it might be a temporary network error due to firewall, and to remove the current master list so it can auto download a new one. This of course is for just one game, Fallout New Vegas.
So I took these steps: I did as asked, deleted the existing master list, no effect. I added Vortex to my permissions which also was suggested, and once again no effect. I then completely turned off all firewalls, and no effect.
Now I'm not sure if this master list thing really matters, it may be a glitch! It says the mods I have on are enabled, everything seems to be fine.
So is this just Vortex's client having an issue, and my game/mods are fine? There's literally just 2 mods installed on a clean installation of the game, and a clean Vortex installation. Everything seems to be fine, mods also run properly on Skyrim so, IDK what the deal is here.

[Pickysaurus]

The error isn't terribly explicit (mostly because this doesn't happen often). The master list is required for Vortex to sort the load order in your plugins tab. If you get these errors it usually means your PC is blocking Vortex from talking to GitHub to download the files. You can try creating a blank text file called Masterlist.yaml at the required location and see if that at least makes the error go away.