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how to understand why the project is not compiled

Hello everybody, i created 2D slide scroller, added sprites and level. Pressed a button “Launch”. At the end of compilation an error appeared:
LogPlayLevel: Error: ERROR: Stage Failed. Missing receipt ‘…target’. Check that this target has been built.

PackagingResults: Error: Launch failed! Missing UE4Game binary.
You may have to build the UE4 project with your IDE. Alternatively, build using UnrealBuildTool with the commandline:
UE4Game <Platform> <Configuration>

How to understand what to do further?
P.S. Sorry for my bad and poor english