Unknown Error When Launching on iPhone 4

“ERROR: No modules found to build. All requested binaries were already part of the installed engine data.”

This means that your project doesn’t include code, but has a plugin available that needs to be compiled. The two options here would be to either disable this plugin or add a blank C++ class to your project which can be done via File > New C++ Class… > Next > Create Class.

The former would be preferred if you don’t need the plugin and would actually make all of those rsync problems redundant as you don’t need to use rsync if you’re not compiling any code. The latter would only be suggested if you need to use the plugin that needs to be compiled. I can’t tell exactly from the log which plugin it is, but I do see that Substance is enabled and that is usually what people have enabled when this occurs.