Problems encountered with rgbd_calibration: Exception parsing YAML camera calibration: yaml-cpp: error at line 0, column 0: bad conversion [ERROR] : Failed to parse camera calibration from file

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This work is a recurrence of Basso's work: https://github.com/iaslab-unipd/rgbd_calibration, but I have encountered the following problems:

[ INFO] [1558852802.759705575]: camera calibration URL: file:///home/lhy/.ros/camera_info/depth_A00362902964053A.yaml

**[**ERROR] [1558852802.762335020]: Exception parsing YAML camera calibration:
yaml-cpp: error at line 0, column 0: bad conversion
[ERROR] [1558852802.762491164]: Failed to parse camera calibration from file [/home/lhy/.ros/camera_info/depth_A00362902964053A.yaml]****

[ WARN] [1558852802.762643002]: Camera calibration file /home/lhy/.ros/camera_info/depth_A00362902964053A.yaml not found.

[0, 0, 0, 0;
 0, 0, 0, 0;
 0, 0, 0, 0]
[ERROR] [1558852802.763309988]: Tried to advertise a service that is already advertised in this node [/calibration/rgbd_offline/set_camera_info]

[ INFO] [1558852802.763406777]: camera calibration URL: file:///home/lhy/.ros/camera_info/rgb_A00362902964053A.yaml

**[ERROR] [1558852802.765104511]: Exception parsing YAML camera calibration:
yaml-cpp: error at line 0, column 0: bad conversion
[ERROR] [1558852802.765185216]: Failed to parse camera calibration from file [/home/lhy/.ros/camera_info/rgb_A00362902964053A.yaml]**

[ WARN] [1558852802.765279760]: Camera calibration file /home/lhy/.ros/camera_info/rgb_A00362902964053A.yaml not found.

[ INFO] [1558852802.846363646]: Getting data...

[ INFO] [1558852813.493671995]: 40 images + point clouds added.

[ INFO] [1558852813.493820898]: Initial transform:

position: 
  x: 0
  y: 0
  z: 0
orientation: 
  x: 0
  y: 0
  z: 0
  w: 1

****[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!****
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!
[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree ...