I feel like I've tried everything at this point. I've tried running the game as administrator (my user on this PC has admin permissions anyway but I tried running the application as admin via right click) I added ForestViewer.exe to applications allowed through Windows Firewall. I reinstalled the game 3 times, I rebooted my computer over 5 times, I tried rebooting my internet wifi modem/router. I even tried the older version of the game from 2009. The only thing I noticed with that one is instead of telling me 0 players were online and error on connection the old version said 37 players online and connection None. Then when I tried to connect it said Error. So nothing seems to be working. I just completed removed the game and gave up. I don't know why Im having so much issues with this game. The computer I'm using is a Windows 10 laptop. I have no problems connecting on other online games.
I have a desktop that is a Windows 7. I'm going to try the game on that computer and see how things go.

If I encounter the same problem on my desktop PC as well I will be sure to leave an edit about it here.

I still really want to play this game on my laptop though, so if anyone has any ideas on how I can get rid of that error to connect in the game I'd very much appreciate it. Thanks ^_^

Edit: After a few hours I finally found the solution for my Windows 10 laptop.
Source: http://endlessforest.org/community/tef-wouldn039t-connect-windows-10-solved