neural networks - Has the usage of CrossEntropyLossLayer changed?

Reading this answer about CrossEntropyLossLayer, I find the following.

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But when I evaluate the same code, I get errors.

CrossEntropyLossLayer[][<|"Input" -> {1}, "Target" -> 1|>]
CrossEntropyLossLayer[][<|"Input" -> {2}, "Target" -> 1|>]
CrossEntropyLossLayer[][<|"Input" -> {20}, "Target" -> 1|>]
CrossEntropyLossLayer[][<|"Input" -> {200}, "Target" -> 1|>]

So has the usage of CrossEntropyLossLayer changed?

I am using Version 11.1.0 for Microsoft Windows (64-bit) (March 13, 2017)