1.问题
报错信息：
Running C:/Program Files/Epic Games/UE_4.27/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project="E:/1_code/3_UE4/HelloWorld/HelloWorld.uproject" -game -rocket -progress
Discovering modules, targets and source code for project...
ERROR: Could not find NetFxSDK install dir; this will prevent SwarmInterface from installing. Install a version of .NET Framework SDK at 4.6.0 or higher.
2.解决方案
下载安装.NET Framework 4.7.2 Developer Pack，
下载完成之后双击安装就行，然后重新创建UE4项目就可以了。