Failed to connect to Swarm

Failed to connect to Swarm.
We’ve tried every recommendation, turn off firewall, antivirus, add to exceptions, etc. Even tried reinstalling Unreal Engine but still getting this error.

Tried to manually launch SwarmAgent.exe, service starts but stop after 5 seconds.
This is log file.
… registering SwarmAgent with remoting service
… registering SwarmAgent network channels
… initializing SwarmAgent
… checking certificate
… certificate check has failed
… initializing cache
… using cache folder ‘C:\Program Files\Epic Games\UE_4.24\Engine\Binaries\DotNET/SwarmCache’
… recreating SwarmAgent cache staging area
… initializing connection to SwarmCoordinator
… using SwarmCoordinator on RENDER-01
[PingCoordinator] Determined that we couldn’t ping the coordinator
[PingCoordinator] Coordinator ping failed
… SwarmCoordinator failed to be initialized
… initializing local performance monitoring subsystem