Project compiles but engine crashes while clicking on play

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1

The project compiles normally, however when opening the editor and clicking on “play” the engine crashes and shows this error…
Exception thrown at 0x00007FF97F42D93F (UE4Editor-Engine.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0x0000000000000340. occurred.

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2

At the bottom left of your screenshot it looks like “ActorThatOpens” is null. You’re passing a pointer around without checking whether it’s null.