Assertion failed

Please tell me what the hell is going on here…

I found this issue already on answerhub, but couldnt extract a solution from it. (As I dont know what this is supposed to mean: “Try to refresh the code in the engine”)
Engine version: 4.9, got this already with 4.8

Assertion failed: InResource && InResource->Target == Target [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.9\Engine\Source\Runtime\ShaderCore\Private\Shader.cpp] [Line: 1017]

Reinstall the engine, or you could try verifying the files first and if that file is corrupted it will fix it.

Your not running a custom build of teh engine are you? Did you build from source or download the binary?

Don’t forget to accept an answer that best clears your question up or answers it so when the community finds your question in the future via search/google they know exactly what you did to fix it/get it going as well as keeping AnswerHub clean so that it gets removed from the “unanswered questions” category.

I downloaded the binary, how can I verify the files?

Go into your Epic Games Launcher and under library hit the yellow/black arrow beside launch and choose verify files. Look at the files it backs up and see if any relate to the errors you got.

I still receive the error.