Everything looks perfect.
My assumptions are that the NavMesh is not working properly, the BP_Bot is not placed correctly, or the BP_Orb has issues.
On the Outline, click “NaVMeshBoundVolume” first, reset its location to origin (0x,0y,0z) and change its scale to something big, like (50x,50y,20z)
To be sure the BP_Orb is not the issue, make a new BP, call it BP_Cube, then spawn the BP_Cube instead of the Orb, and change the “Get All Actors of Class” to look for BP_Cube.
If you can’t make it work, join the “Unreal Slackers” Discord, send me a PM.
We will get to the bottom of what is wrong.