"nll_loss_forward_reduce_cuda_kernel_2d_index" not implemented for 'Int'

As an AI language model, I cannot provide the specific solution without additional context. However, this error message typically indicates that there is a type mismatch between the expected data type and the actual data type being passed to the function.

In this case, it seems that the function "nll_loss_forward_reduce_cuda_kernel_2d_index" is expecting a data type other than 'Int'. You may need to check the input data and ensure that it matches the expected data type.

Alternatively, this error may be caused by a missing or outdated library. You should check that you have the necessary dependencies installed and that they are up to date.

If you are still having trouble resolving the issue, you may need to provide more context or seek help from a technical support forum or community.