unreal engine scene customization problem

greetings

how can i solve it ?

it appears whenever i emable matlab plungin

[Rik]

Did you follow the guide exactly, up to the version number of UE? (I don't know if that makes a difference, but I would personally start there)

[Nada Selim]

I am using UE version 4.23 with Matlab 2020b as mentioned in documentation

I am trying to follow step2 here https://www.mathworks.com/help/driving/ug/customize-scenes-using-simulink-and-unreal-editor.html

[Nada Selim]

knowing that i have done step1 successfully any recomendations?