Test4, Could not initialize supporting library

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) 1050Ti
• DeepStream Version 5.0
• JetPack Version (valid for Jetson only)
• TensorRT Version 7.0
• NVIDIA GPU Driver Version (valid for GPU only) 440.100

Hi, We can successfully run test5 and send message to kafka, however, we get ERROR when we run test4.

Our command:
deepstream-test4-app -i /opt/nvidia/deepstream/deepstream-5.0/samples/streams/sample_720p.h264 -p /opt/nvidia/deepstream/deepstream-5.0/lib/libnvds_kafka_proto.so --conn-str= “add;port;test”

ERROR:
Could not initialize supporting library.

HI,
connection string for kafka:
For Kafka - Connection string of format: host;port;topic
and you could refer to sources/libs/kafka_protocol_adaptor/ test sample to trouble shoot where get wrong.