Player falling through the ground (867147)

Unity Engine
1

Hello,
I am having an issue with my player falling through the terrain i made, its also falling through if i put a cube under the player.
The player is just a cylinder with a main camera inside that is affected by gravity. I have tried to add Mesh collider to the cylinder and the terrain but that doesnt seem to work.

2

is Trigger ?
Have a you a RigidBody on each object?