mt.exe : general error c101008a: Failed to save the updated manifest to the file

try deleting the .embed.manifest file specifically. If you're working in an environ where a build takes 20 minutes, this will save you lots of time.

这是微软论坛提供的解决办法，去工程文件夹下搜索.embed.manifest，删掉manifest类型的文件即可