Problem running deepstream 4.0.2 sample

Accelerated Computing Intelligent Video Analytics DeepStream SDK
#1 
deepstream-app -c deepstream_app_config_yoloV2_tiny.txt 
** ERROR: <create_primary_gie_bin:107>: Failed to create 'primary_gie_classifier'
** ERROR: <create_primary_gie_bin:161>: create_primary_gie_bin failed
** ERROR: <create_pipeline:1045>: create_pipeline failed
** ERROR: <main:632>: Failed to create pipeline
Quitting
App run failed

a-desktop:~/Documents/deepstream_sdk_v4.0.2_jetson/sources/objectDetector_Yolo$ deepstream-app --version
deepstream-app version 4.0.2
DeepStreamSDK 4.0.2

What could be the issue here, I tried to run some sample codes toc heck if deepstream is working ?
Jetson Xavier AGX , Jetpack 4.3 using nvidia sdkmanager.

Tensorrt is 6.0.1

#2

Hi,
The error shall disappear after cleaning gstreamer cache.
https://docs.nvidia.com/metropolis/deepstream/dev-guide/index.html#page/DeepStream%2520Development%2520Guide%2Fdeepstream_quick_start.html%23wwpID0E0CF0HA
Please clean the cache and try again.

#3