Custom character cant walk

[StickCannon]

I have been trying to solve this issue for a few days with no success. A custom character I’ve made can’t walk properly and instead slides around after jumping.

I’ve already tried increasing HipHeight

Rig and script for morphing:
rig.rbxm (37.3 KB)

local oldCharacter = player.Character
local newCharacter = rig:Clone()

newCharacter.HumanoidRootPart.Anchored = false
newCharacter:PivotTo(oldCharacter.PrimaryPart.CFrame)
player.Character = newCharacter
newCharacter.Parent = workspace

[O3_O2]

Your character has way too much mass to move itself, select all of the parts inside of the character and make them massless.