The issue is about migrating from TensorFlow 1.x to 2.0, where the contrib module was removed. The user should refer to the official TensorFlow migration guide (https://www.tensorflow.org/guide/migrate) and update the code to use tf.keras or other modules. The repository code likely uses tf.contrib.seq2seq which needs to be replaced with tensorflow addons or custom implementations. Check the repo's requirements and adapt the model accordingly.
