Android build failed

I downloaded the source code of UE4 and build it with a configuration of Win64 Development Editor. Then I followed the steps of Android Quick Start but failed to build a version for Android. In the log, it said “PackagingResults:Error: Error Launch failed! Unknown Error”. How can I fix it?!This my sdk settings

and [LOG FILE][3]


Please make sure that you’ve deleted your Intermediate and Saved files. I would also suggest checking with a new, blank template and seeing whether or not you’re able to package for Android. Verify that you can launch onto an Android device. After you’ve checked all of that, I would also test with 4.13.1 and see if you’re still having the issue with your project.

Thank you!