Nan in Poisson Solve Backward

[iszihan]

Hello, I'm wondering have you seen this error and know what's possibly wrong?

  File "/home/**/Documents/projects/3d-detailization/TextDeformer/NeuralJacobianFields/PoissonSystem.py", line 476, in backward
    assert not torch.isnan(grad).any(),  "Nan in the backward pass of the POISSON SOLVE"
AssertionError: Nan in the backward pass of the POISSON SOLVE

I'm simply replacing the mesh in the example script with my own mesh that has around 10k vertices and only has one connected component.