So I have been having problems with Minecraft Forge and FML not loading worlds. I figured out it was my firewall. I have disabled both my windows and antivirus (Avast) and it now works. If anyone knows how to port forge into the firewalls and not minecraft itself (I have already done this), please leave a response below. Thank you very much for your time.
EDIT: I have disabled each firewall at a different time and when I had the avast enabled minecraft crashed. When Windows firewall was enabled and avast was disabled, it worked.