Blocked on unet_model for U-net assignment

[TMosh]

Here is a thread that discusses a similar issue:

ValueError: Layer conv2d_246 expects 1 inputs, but it received 2 input tensors. Inputs received: [<tf.Tensor 'max_pooling2d_84/MaxPool:0' shape=(None, 48, 64, 32) dtype=float32>, <tf.Tensor 'conv2d_245/Relu:0' shape=(None, 96, 128, 32) dtype=float32>]

getting the following errors :ValueError: Layer conv2d_246 expects 1 inputs, but it received 2 input tensors. Inputs received: [<tf.Tensor ‘max_pooling2d_84/MaxPool:0’ shape=(None, 48, 64, 32) dtype=float32>, <tf.Tensor ‘conv2d_245/Relu:0’ shape=(None, 96, 128, 32) dtype=float32>]