NaN Calc World cframe : Error

I just created my game about 2 months ago then this appears when I try to teleport myself into the portal. When the error appears, my fps fall to 0 in seconds.

The local script just does the HumanoidRootPart Teleport in front of the portal but…

Video :

I have no step to reproduce this because it just appears randomly. Sorry.

Show us the part of the code where the problem appears.

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I resolved the error. It was in my script when I try to change the CFrame of the HumanoidRootPart of the player.