RNNEmbedding IllegalStateException

[akasyuka]

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Run RNNEmbedding
Receive:
Exception in thread "main" java.lang.IllegalStateException: Sequence lengths do not match for RnnOutputLayer input and labels:Arrays should be rank 3 with shape [minibatch, size, sequenceLength] - mismatch on dimension 2 (sequence length) - input=[3, 7, 8] vs. label=[3, 4, 8]

How to fix?