What does the ValueError 'Dimension must be 2 but is 3 for {{node lambda/transpose}}' indicate?

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The ValueError 'Dimension must be 2 but is 3 for {{node lambda/transpose}}' indicates that there is an issue with the dimensions of a tensor, where the tensor is expected to have 2 dimensions but has 3 dimensions. This error message is typically encountered in deep learning frameworks such as TensorFlow, where an operation expects a 2D tensor as input but is given a 3D tensor, leading to a dimension mismatch error.