Good afternoon everyone,
I am currently facing the same problem and I can tell you, from the three solutions listed, it's unlikely it's one of the first two: your internet or router (if you have a good connection). I recently got a new router and boosted the speed of our internet; I had the issue before and thereafter. It could be the game, a missing file or link of some sort but as above, seems unlikely.
If your game ran before, it only stopping recently (after the update, which I am grateful of as it allows those whom used Feral-Heart as a method of relief to continue acting as their support), then all files necessary should still be in tact, otherwise it wouldn't have ran properly. Am I correct? I can vouch for this as I recently was forced to re-download the game; got a new computer. Now given, this was a month back but since then, I haven't messed with the internal files it downloaded alongside the base programming. I would have, had I been more like my younger self, engrossed in creating maps and presets. Anyway!
I shall be attempting to re-download the game tomorrow. I cannot say if it'll work but I'll update you on the results should those partaking in this thread be interested; though, I assume it's already been done by one of the participants. If so, any luck?
While this issue is being sorted, I'm looking forward to reading all possible solutions. Feral-Heart's grown on me, as much as I omission to concede such.
- Angarika/Blakyhart