Undefined function or variable 'batchNorm​​alization​L​ayer'.

Hi, I keep getting the following error when running the example below:

Undefined function or variable 'batchNorm​alizationL​ayer'.

The code is written as:

layers = [
    imageInputLayer([28 28 1])
    
    convolution2dLayer(3,8,'Padding','same')
    batchNormalizationLayer
    reluLayer
    
    maxPooling2dLayer(2,'Stride',2)
    
    convolution2dLayer(3,16,'Padding','same')
    batchNormalizationLayer
    reluLayer
    
    maxPooling2dLayer(2,'Stride',2)
    
    convolution2dLayer(3,32,'Padding','same')
    batchNormalizationLayer
    reluLayer
    
    fullyConnectedLayer(10)
    softmaxLayer
    classificationLayer];

I also have the neural network add-on installed so that cant be the problem.