At platform Android sdk settings set SDK API LEVEL TO: to matchndk.
At Android settings set Minimum Version to 21 and Target SDK version to 23.
Delete intermediate, build, saved folders in the project directory, and binaries intermediate folders, in all the plugins directories.
Then generate visual studio solution open it and build with visual studio.
Then open the project with the editor and try to package for android.
You can try the 4.14 version of unreal.
Don’t forget, the first time you open your project, you have to manually enable plugins from the editor then restart and then package for android.