RuntimeError: shape [512, 256, 3, 3] is invalid for input of size 391694

This error message indicates that there is a problem with the shape of the input data being passed into the model. Specifically, the input tensor has a shape of [512, 256, 3, 3], which is not compatible with the total number of elements in the tensor, which is 391694.

There are a few possible causes for this issue. One possibility is that there is an error in the data preprocessing step, which is resulting in an incorrect shape for the input tensor. Another possibility is that the model architecture is not appropriate for the input data, and is generating an invalid tensor shape as a result.

To resolve this issue, you should carefully review the data preprocessing and model architecture code to identify any potential errors. You may also need to adjust the model architecture or input shape to ensure that they are compatible with each other. Additionally, you can try reducing the batch size or input resolution to see if that resolves the issue.