How to make character walking, not flying

[amazingDeveloper]

When I start simulation (any kind of the all possible), my character is flying, but I want to make him walking.
I have the same situation for the Player Start component and First Person Character from the engine’s template scene.

Floor is a cube brush, so it have a collider.
What is wrong?

[kaifhuang_1 (Tencent R&DTencent R&D)]

Is the character taking anything on the hand?
I met the same problem while attaching a weapon on character’s hand.
The reason why the character fly is because the weapon has collided with the character.

[amazingDeveloper]

Thisi is a character from the template like in the screenshot, but without weapon and hands. There is it works fine, but in my game - no