To everyone experiencing this,
I’ve enabled the IPv4 in the windows settings, and it seemed to be working now
Nevermind, it was just pure luck. Still having hte same issue. It is very frustrating and making working in unreal with the new MH pretty unreliable sadly @JamesPullan
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Seriously no more help from Epic? Happening to me as well.
I find the final answer, please modify dns to 8.8.8.8, then all problem is ok
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Hi James ,
I am facing login issues.
I tried with your link i logged out from all devices but still no luck.
I still am landing on download page.
Any suggestion or help ,i would appreciate as qm stuck since more than a week
With regards
Rakesh
china, can’t ping s3.us-east-1.amazonaws.com
This problem is encountered by a lot of people, and many users in China have reported this problem on social media, because of the network restrictions here, everyone uses VPN, and from the logs, this problem seems to appear in 2 aspects, 1: There seems to be a parameter of waiting for 10 seconds when requesting the server, and if the server does not respond in time, it will be interrupted. 2: More users are progressing to 75%, then stop, and then fail, the reason for the failure seems to be a timeout, the log shows that 300 seconds is not over, so interrupt the request, the specific reason may be that the network speed of the VPN cannot complete the transfer of resources within 300 seconds, I don’t know if the editor provides a configuration file to modify the timeout time, otherwise I can do a modification test
Still having issues - VPN seems to work better than my direct connection - I have 5G network and can download and stream at high speed. notwithstanding the China issue (I’m in the UK) I think its a server issue with Epic - maybe they are just too busy. Maybe Epic needs to put in more kit.
I found that my Unreal Editor had closed, reopened that and I was able to create the rig. Not sure if this is the same for you guys, but I hadn’t noticed it had closed.
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 
I was getting ‘Server Error’ whenever I tried to download textures or create full rig so I set my dns to google dns and ping s3.us-east-1.amazonaws.com runs fine for me, and I can download textures now but whenever I try to create full rig I still get the same old ‘Server Error’
Edit: It worked after I enabled Online Services EOS
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I am also having this issue in 5.6.1 even when I connect using a VPN and ping amazon server withing 250ms and lost=0.
I am still unable to create a rig and unable to download texture. When I create rig, the progress bar keep stuck at 75% no mattar what VPN location I switch to and closing and open editor.
Note: Copied from another similar thread, pasting here because it resolved my problem:
“I discovered this thread when I faced the same issue last night. It was very frustrating, as I had to complete an important project. However, early in the morning today, surprisingly, doing the following process resolved this problem for me (auto-rigging face mesh server error at 75%):
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I disabled the revision control software (Diversion) which was my latest addition to unreal, in fact, the day before yesterday. Before that I had never faced the above issue. Then I turned off Diversion plugin in unreal and uninstalled the app from Windows as well.
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Next I logged out of Epic Games Launcher, Fab, dev.epicgames, and Quixel Mixer.
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Restarted my PC (and if you believe in witchcraft, then right click on the desktop and refresh for three times hahaha, I didn’t do it though)!!
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Logged back into my Epic Games Launcher, retried creating full rig, and it was successfully done.”
I hope it will help someone!