After pulling new content from GitHub, be sure to rerun ‘GenerateProjectFiles.bat’, as you won’t be able to compile if any new classes were added. If you still have problems compiling the latest version of the dev_MixedReality branch, then please file an issue on GitHub for the team to investigate.
Also, if you’re using the GitHub desktop UI to clone the project, you’ll need to run ‘setup.bat’ before ‘GenerateProjectFiles.bat’.