btlorch

Thanks for the hints. The method `tf.nn.sparse_softmax_cross_entropy_with_logits` expects categorical labels, i.e., integer values in the range `[0, num_classes)`. If I interpret [the line](https://github.com/GPflow/GPflow/blob/8e0744af8717e0e341a92fc8fd509bc4e939c8fb/gpflow/quadrature/deprecated.py#L200) `D_out = Y.shape[1]` correctly, the quadrature method...

Thanks for looking into this issue. > [...] your suggested change seems reasonable, but you will want to take out the `Log` outcome transform in that case. But if the...

Thanks, I updated my initial post with the list of extensions. As far as I can see, the versions should be compatible according to the version compatibility table.

My matplotlib version is 3.9.0.

Hm, I shut down and close the notebook, then reopen it, I can see the figure. When I create another new notebook, there the figure does not show up.