I am getting no error but the training and validation accuracy and loss all are zero. 

Epoch 2/5 92/92 [==============================] - 11s 122ms/step - loss: 0.0000e+00 - accuracy: 1.0000 - val_loss: 0.0000e+00 - val_accuracy: 1.0000

Check the folder structure you have given to your ImageDatasetGenerator of image_dataset_from_directory function.

Probably you images are deep in subfolders, and these objects look only at first level of folder structure.