The three dots should indicate additional dimensions while the last two dimensions would represent n_mels and time.
Could you set n_mels to 432 in InverseMelScale as it should work:
inv_mel = torchaudio.transforms.InverseMelScale(n_stft=1023, n_mels=432)
x = torch.randn(288, 432, 4)
out = inv_mel(x)
print(out.shape)