I encountered an error compiling the Cesium source code for Unreal. Does anyone know what the problem is? thank you

当下载Cesium for unreal源码后我使用 cmake -B build -S .命令出现了一个报错。

My first guess is that you’re missing cesium-native’s submodules. Try running:

 git submodule update --init --recursive

Thank you very much for your help. This problem is mainly caused by the cesium-native source code I downloaded