Error in models defined under research folder -> "object_detection.protos.StringIntLabelMap" has 'no field named node'.

2020-02-19 18:13:17.900514: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'libnvinfer.so.6'; dlerror: libnvinfer.so.6: cannot open shared object file: No such file or directory; LD_LIBRARY_PATH: /usr/local/nvidia/lib:/usr/local/nvidia/lib64 2020-02-19 18:13:17.900660: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'libnvinfer_plugin.so.6'; dlerror: libnvinfer_plugin.so.6: cannot open shared object file: No such file or directory; LD_LIBRARY_PATH: /usr/local/nvidia/lib:/usr/local/nvidia/lib64 2020-02-19 18:13:17.900681: W tensorflow/compiler/tf2tensorrt/utils/py_utils.cc:30] Cannot dlopen some TensorRT libraries. If you would like to use Nvidia GPU with TensorRT, please make sure the missing libraries mentioned above are installed properly. [ WARN:0] global /io/opencv/modules/videoio/src/cap_v4l.cpp (802) open VIDEOIO ERROR: V4L: can't open camera by index 0 Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/object_detection/utils/label_map_util.py", line 142, in load_labelmap text_format.Merge(label_map_string, label_map) File "/usr/local/lib/python3.6/dist-packages/google/protobuf/text_format.py", line 702, in Merge allow_unknown_field=allow_unknown_field) File "/usr/local/lib/python3.6/dist-packages/google/protobuf/text_format.py", line 770, in MergeLines return parser.MergeLines(lines, message) File "/usr/local/lib/python3.6/dist-packages/google/protobuf/text_format.py", line 795, in MergeLines self._ParseOrMerge(lines, message) File "/usr/local/lib/python3.6/dist-packages/google/protobuf/text_format.py", line 817, in _ParseOrMerge self._MergeField(tokenizer, message) File "/usr/local/lib/python3.6/dist-packages/google/protobuf/text_format.py", line 909, in _MergeField (message_descriptor.full_name, name)) google.protobuf.text_format.ParseError: 1:1 : Message type "object_detection.protos.StringIntLabelMap" has no field named "node".

How should I resolve this error? I was using Faster-RCNN pretrained model and when I run main file I got this error..
google.protobuf.text_format.ParseError: 1:1 : Message type "object_detection.protos.StringIntLabelMap" has no field named "node".

Please help me to solve this error..