I’m a beginer while exploreing unreal4. Problem turns out when I try to build light. For a template level, I clicked build and the edictor freezed and swarm not working. The log: Local agent failed to initialize with an IPC channel! Falling back to TCP [ERROR] Local agent failed to initialize with a TCP channel! Fatal error.
I have searched different solutions including deleting contents as official solution of former similar problem, reinstalling, building light on different versions of Unreal4, turn off firewall and antivirus. None of them works.
All, I have found the solution right after I post the question
Simply download this file and start the reg file. Hopefully it works. And sorry for the inconvenience. Download