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Blueprint Essentials Tutorial Project

Came to try Unreal Engine again. Went to the new coarse library, found Blueprint Essentials, downloaded the project files, open a copy, and I am presented with an empty world outliner and a black blank perspective viewport.

Meanwhile the video shows all kinds of fancy things to explore like doors and triggers.
What did I do wrong?

https://learn.unrealengine.com/course/2436619/module/5328664