PrecompiledAssemblyException: Multiple precompiled assemblies with the same name Mono.Cecil.dll included or the current platform. Only one assembly with the same name is allowed per platform. Assembly paths:
Assets/Apshai Arts/CodeGuard/Editor/Mono.Cecil/Mono.Cecil.dll
最后发现原版是没有的这个dll的，所以删除code冲突插件就好了。