Can't Start Sedicated Server

I can play BF4, BF3, Unreal Tournament, Halo Online but cant host a Halo 5 Forge for Windows 10 game. If I lose all my modded maps I worked on FOR HOURS AND HOURS I’m really gonna be pissed off!
( Side Note ) All forged maps should be saved on hard drive LOCALLY not on some cloud! So you can work on your maps WITHOUT having to be online like in halo 3.
ERROR MESSAGE:
ATTENTION: THERE WAS A PROBLEM WITH THE DEDICATED SERVER PLEASE TRY AGAIN