So in version 4.15, I opened up a new level using the VR-basic template that comes with the engine. I test it out and everything works fine until i bring in my walls. So i scaled the floor to match the size of my walls and this is when all the props and character falls through the floor. I checked the collision setting and nothing should have changed. I move the player-start up the Z-axis too. Something must have changed once i scaled the floor or imported my meshes.
EDIT: Solved it as i typed it out. I guess writing the problem out helped XD. I just re-imported my meshes with different settings. Thank you!