you can use body movers or constraints to move your NPC, it’s way more efficent and better + you have more control. It will be a bit harder, but it will be worth it. Humanoids are buggy, soo don’t use them, and if you wan’t health, make your own system for this
You have the MaxSlopeAngle highlighted so do you mean it won’t climb an angled Part?
Is the problem that the NPC won’t enter a doorway made of Parts, or is it a Union with a door opening cut out of it? If it’s a Union door opening the Union may actually be blocking the NPC so it may not be a MoveTo problem.
Please post a picture showing what is happening, it may explain it better.
Where is the Position of the End Part in the Workspace?
The HumanoidRootPart will try to MoveTo that Position. If it’s on the floor then the Humanoid will try to push down to get to that point. Make the Part at the same height as the RootPart, which should be at 3 studs above the floor.