Just made an account to say im having the same problem, trying to join some friends on steam and it keeps disconnecting me when i try to join them, even if i try to make one it does the same thing

Same issue!

Please could you provide us with your diagnostics files?

Diagnostic files: Located by default: 

• PC:\Users\[username]\Documents\Humankind\Temporary Files\

Lt_Miles wrote:

Please could you provide us with your diagnostics files?

Diagnostic files: Located by default: 

• PC:\Users\[username]\Documents\Humankind\Temporary Files\

Diagnostics_20210820_192413225.html

Not a game dev or anything, but I am a software developer. 
Looking at the Diagnostics, it looks like there is some difference in the patch revision versions.
Just curious, Jakoby, are you playing with friends or strangers? If so, is the person hosting the lobby using a different platform then you? (Like are you using Steam and they are using Epic Games Store)

I'm with the same problem. Pls Help

Got the same Problem. Cant create or join multiplayergames. :(

Diagnostics (2021'08'20 @2037'10''386''').html

Already tryed to reconnect the MS-Account in Gamepass-PC, deleted all Humankind-files and connected to my smartphone.

LuccaDSoupLie wrote:

I've put up a network trace and it seems like during the initial black screen the game fetches all the info of the people you follow. Interestingly, it always fetches your own Gamertag last, so if you have more than 15+ people you follow, it does not reach that point as XBL servers throttle your calls. Hence the empty Gamertag and not working MP. That's why new accounts work and old ones with many friends don't. So as a temporary measure, until the devs fix the issue, you could try reducing the number of follows you have (I think anything less than 14 should work). 

Let me know if that fixes it for anyone as that will help AMP address the root cause sooner.

He solved it! Well done and thank alot! Got an old Xbox-Acc with more then 15 friends. Deleted down to 14, and it worked.

JohanBak wrote:

DaOwnaZZ wrote:

LuccaDSoupLie wrote:

I've put up a network trace and it seems like during the initial black screen the game fetches all the info of the people you follow. Interestingly, it always fetches your own Gamertag last, so if you have more than 15+ people you follow, it does not reach that point as XBL servers throttle your calls. Hence the empty Gamertag and not working MP. That's why new accounts work and old ones with many friends don't. So as a temporary measure, until the devs fix the issue, you could try reducing the number of follows you have (I think anything less than 14 should work). 

Let me know if that fixes it for anyone as that will help AMP address the root cause sooner.

He solved it! Well done and thank alot! Got an old Xbox-Acc with more then 15 friends. Deleted down to 14, and it worked.

Yup - can confirm that this worked for me and three friends. Bravo! So anyone on Game Pass without issues just doesn't have many friends :P

I have the error but only have 5 friends.