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Swarm Agent Error

Hi! I met the problem of the swarm agent. When I start building the light, it stuck at “starting up the swarm connection” and stuck at “100%”

When I search the Agent log diary, it said:

Starting up SwarmAgent …
… registering SwarmAgent with remoting service
… registering SwarmAgent network channels
[ERROR] Channel already registered, suggesting another SwarmAgent or client is running.
[ERROR] If you feel this is in error, check your running process list for additional copies of
[ERROR] SwarmAgent or UnrealLightmass (or other client) and consider killing them.
[ERROR] Sleeping for a few seconds and trying again…
[ERROR] Channel registration failed. Reason: 创建 IPC 端口失败: 拒绝访问。(Failed to connect to an IPC port: Access Denied)

I have tried it on both 4.26 and 4.27, and they both have the same issue…

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