โ ๏ธWeapon is not moving
Reason
If animations like idle, movement, equip and unequip are not playing, this is usually a sign of the Additive Layer problem. There could be two potential issues:
Additive Layer is not added or set up properly.
Curve animations are not added or they use a different skeleton hierarchy.
Solution
First, it is important to check if Additive Layer is adjusted properly:

If the issue still occurs, then it means the issue is with curve animations. These animations are usually located in the animator controller as a separate layer:

where the curve mask only includes the Weapon Bone Additive:

To add a Weapon Bone Additive to a custom Avatar Mask, make sure to visit the Tools page.
Finally, it is important to check the actual curve animation bone paths:

If the path in the image above does not match a character skeleton, the animation will not be played. To solve this problem, follow these steps:
Duplicate the curve animation.
Copy WeaponBoneAdditive curves from the original to the target animation Tools.
Assign the animation in the animator controller.
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