There seems to be a problem with the engine file creation.
deepstream-app -c deepstream_app_config.txt
Using winsys: x11
ERROR: Deserialize engine failed because file path: /home/iisl/Desktop/deepstream-6.0/sources/DeepStream-Yolo/model_b1_gpu0_fp32.engine open error
0:00:03.351601764 22501 0x1e26b240 WARN nvinfer gstnvinfer.cpp:635:gst_nvinfer_logger:<primary_gie> NvDsInferContext[UID 1]: Warning from NvDsInferContextImpl::deserializeEngineAndBackend() <nvdsinfer_context_impl.cpp:1889> [UID = 1]: deserialize engine from file :/home/iisl/Desktop/deepstream-6.0/sources/DeepStream-Yolo/model_b1_gpu0_fp32.engine failed
0:00:03.351806247 22501 0x1e26b240 WARN nvinfer gstnvinfer.cpp:635:gst_nvinfer_logger:<primary_gie> NvDsInferContext[UID 1]: Warning from NvDsInferContextImpl::generateBackendContext() <nvdsinfer_context_impl.cpp:1996> [UID = 1]: deserialize backend context from engine from file :/home/iisl/Desktop/deepstream-6.0/sources/DeepStream-Yolo/model_b1_gpu0_fp32.engine failed, try rebuild
0:00:03.351843487 22501 0x1e26b240 INFO nvinfer gstnvinfer.cpp:638:gst_nvinfer_logger:<primary_gie> NvDsInferContext[UID 1]: Info from NvDsInferContextImpl::buildModel() <nvdsinfer_context_impl.cpp:1914> [UID = 1]: Trying to create engine from model files