train_dir = "/content/gdrive/My Drive/spectrograms3sec/train/"
train_datagen = ImageDataGenerator(rescale=1./255)
train_generator = train_datagen.flow_from_directory(train_dir,target_size=(288,432),color_mode="rgba",class_mode='categorical',batch_size=128)
validation_dir = "/content/gdrive/My Drive/spectrograms3sec/test/"
vali_datagen = ImageDataGenerator(rescale=1./255)
vali_generator = vali_datagen.flow_from_directory(validation_dir,target_size=(288,432),color_mode='rgba',class_mode='categorical',batch_size=128)
output: Found 0 images belonging to 3 classes.
Found 0 images belonging to 3 classes.
why is so?