Hello Pexxan, welcome to the Unreal community and thank you for posting your question.
To adjust your navigation settings:
You can go to Project Settings/Navigation Mesh and adjust a few values:
Agent Max slope set to 44 (default)
Agent Max step height to 35 (default)
Changed to:
Agent Max slope set to 90 on both.
Here are the results of my findings:
Alternatively, you can change the information in your AI/Character just like in this thread tutorial.
I hope this helps.