TFFRCNN Nontype error when run demo and train

I have encountered the Nontype error when I run demo and train. I do exactly the same thing in Readme. Can anybody help me solve this problem?

Tensor("data:0", shape=(?, ?, ?, 3), dtype=float32) Tensor("conv5_3/Relu:0", shape=(?, ?, ?, 512), dtype=float32) Tensor("rpn_conv/3x3/Relu:0", shape=(?, ?, ?, 512), dtype=float32) Tensor("rpn_conv/3x3/Relu:0", shape=(?, ?, ?, 512), dtype=float32) Tensor("rpn_cls_score/BiasAdd:0", shape=(?, ?, ?, 18), dtype=float32) Tensor("gt_boxes:0", shape=(?, 5), dtype=float32) Tensor("gt_ishard:0", shape=(?,), dtype=int32) Tensor("dontcare_areas:0", shape=(?, 4), dtype=float32) Tensor("im_info:0", shape=(?, 3), dtype=float32) Tensor("rpn_cls_score/BiasAdd:0", shape=(?, ?, ?, 18), dtype=float32) Tensor("rpn_cls_prob:0", shape=(?, ?, ?, ?), dtype=float32) Tensor("Reshape_2:0", shape=(?, ?, ?, 18), dtype=float32) Tensor("rpn_bbox_pred/BiasAdd:0", shape=(?, ?, ?, 36), dtype=float32) Tensor("im_info:0", shape=(?, 3), dtype=float32) Tensor("rpn_rois:0", shape=(?, 5), dtype=float32) Tensor("gt_boxes:0", shape=(?, 5), dtype=float32) Tensor("gt_ishard:0", shape=(?,), dtype=int32) Tensor("dontcare_areas:0", shape=(?, 4), dtype=float32) Tensor("conv5_3/Relu:0", shape=(?, ?, ?, 512), dtype=float32) Tensor("roi-data/rois:0", shape=(?, 5), dtype=float32) [<tf.Tensor 'conv5_3/Relu:0' shape=(?, ?, ?, 512) dtype=float32>, <tf.Tensor 'roi-data/rois:0' shape=(?, 5) dtype=float32>] Traceback (most recent call last): File "./faster_rcnn/train_net.py", line 101, in network = get_network(args.network_name) File "./faster_rcnn/../lib/networks/factory.py", line 29, in get_network return VGGnet_train() File "./faster_rcnn/../lib/networks/VGGnet_train.py", line 17, in init self.setup() File "./faster_rcnn/../lib/networks/VGGnet_train.py", line 85, in setup .fc(4096, name='fc6') File "./faster_rcnn/../lib/networks/network.py", line 36, in layer_decorated layer_output = op(self, layer_input, *args, **kwargs) File "./faster_rcnn/../lib/networks/network.py", line 377, in fc feed_in, dim = (input, int(input_shape[-1])) TypeError: int returned non-int (type NoneType)