My metahuman live link face suddenly stopped working

[zucchini_ue]

The live link face works well at first, but it failed suddenly, I did nothing at all.

The source looks good in the live link hub, but I can’t select the subject from the list in my level for the metahuman.

I’ve restarted the editor and live link hub for many times and even the whole computer.

And I’ve try to add anoter metahuman actor in my level, and also not work well.

What’s the problem here?

The clients list is empty, it didn’t conneted to my Editor.

PS：I found the error int the live link hub’s log

LogPython: Display: 正在运行启动脚本C:/Program Files/Epic Games/UE_5.6/Engine/Plugins/Animation/ControlRig/Content/Python/init_unreal.py…… started…
LogPython: Error: Traceback (most recent call last):
LogPython: Error: File “C:/Program Files/Epic Games/UE_5.6/Engine/Plugins/Animation/ControlRig/Content/Python/init_unreal.py”, line 26, in
LogPython: Error: import ControlRigWorkflows.workflow_fbik_import_ik_rig
LogPython: Error: File “C:\Program Files/Epic Games/UE_5.6/Engine/Plugins/Animation/ControlRig/Content/Python\ControlRigWorkflows\workflow_fbik_import_ik_rig.py”, line 8, in
LogPython: Error: import ik_rig_asset_query
LogPython: Error: ModuleNotFoundError: No module named ‘ik_rig_asset_query’

[DefaultDeveloper]

Hi!
Can you try setting the auto connect method to All? That could rule out a a bug where it doesn’t consider your unreal as being local.

Does the LiveLinkHub source show up in Unreal when you open the LiveLink panel?

[RCLGraham]

I have the same issue. It worked fine in 5.6 but broken in 5.6.1.

Setting the auto connect to All isn’t working either

[zucchini_ue]

I’ve solved it by change the project’s setting. Change the IP from 0.0.0.0 to 127.0.0.1

[KiddBA (Ben Kidd)]

Hello,

Yes indeed UDP endpoints are important to be set to the network interface you would like livelink to be sent and received on. There are two places this can be set:

1. In livelink hub settings > UDP Messaging > Unicast Endpoint
2. In the Unreal Editor > Project settings > UDP Messaging > Unicast Endpoint

In both of these places set the endpoint to the network you wish to communicate on.

By default these are set to 0.0.0.0 which automatically picks the primary network interface, however this can sometime change, especially with VPNs involved, so its a good idea to manually set them.

For more information about UDP settings this documentation is helpful: UDP Messaging Settings in the Unreal Engine Project Settings | Unreal Engine 5.6 Documentation | Epic Developer Community