That isn't supposed to be included in the build profile, I just removed it and pushed the changes to the source code repo. You can either update or just click the Build menu in VS and choose Configuration Manager and uncheck LanguageRemover so it doesn't build when the solution is built. It is only meant to build language remover on demand if you need to remove some resx files to improve debug performance in mojoPortal.Web project. ie that project just runs a post build event that deletes some files from Web/App_GlobalResources. Probably on your machine the error code means a permission problem, but it doesn't need to run when the solution is built and should be removed from the build profile.
Hope that helps,