Originally Posted by The_Breeze
Two things here, second one first: I get a 404 Not Found unless I physically paste the URL into the address bar. This is could be a proxy or DNS issue within the forum infrastructure and/or internet provider.
On the first, make sure your shortcut uses https and not http. I've had that happen to me on a few sites that converted to https. You would expect an auto consumption of the old URL and a 'redirect' (so to speak) to the new but the second issue suggests there isn't a lot of investment made in the technical side of this platform (in my opinion).
With the Forum here, if you are not logged in, MANY links do not work. These links I posted still work for ME(I am logged in).
But, I have Firefox set up so that every time it starts, it opens up about 8 tabs with different sites I use all the time. The Thor Forums one gives ME this error. I also have iRV2 Forums open auto and it does NOT give the error. Thor Forums runs a "different" setup than iRV2, like the fact links do not work if not logged in (they work with iRV2) and the two sites are under one umbrella.
One thing though, Linux Mint (My OS) had a Firefox update just about the time this 'problem' started... may have a bearing on it.