After loading a Crowd Character into the map, my map is showing weird textures and lighting is not like before

[Seschw]

I use the map Downtown West (Downtown West Modular Pack in Environments - UE Marketplace) I modified the world a little bit and I did not have any problems with light and rendering (it looked basically like in the screenshots).

Then I loaded a Crowd Character from City Sample Crowd into the map. Right in this moment the world turned weird with the lighting and the rendering of some textures, it took 12000 shaders to render so I thought after all shaders load, the map will look like before again, unfortunately that did not happen and now I have a weird looking map. I appended some screenshots, on how it looks now.

How can I make my map look like before again, does it have something to do with loading a BP_CrowdCharacter or does it have to do with something else?

[Seschw]

When using the CitySampleCrowd there will be three popups appearing when you add BP_CrowdCharacter, where they suggest to change the project settings. Do not turn on the 2nd one from the top, because that will break many assets and the lighting of the “Downtown_West”