Ultimate Solution：for areas doesn’t needs “ladders”, manually change you network adaptors configuration (tcp/ipv4) dns addresses to 8.8.8.8 and 8.8.8.4 and enable the Online Services EOS plugin in the unreal engine, login the fab.com if the webpage pop up after you click “create full rig” or “Download texture source”. Same steps above applies to areas needs “ladders”, but you should connect the ladders first and then change the dns manually. you can also test using your windows cmd line using : ping s3.us-east-1.amazonaws.com
the result’s “lost” must = 0, otherwise no need to run metahuman in ue maybe this will save you some time 