Error while running deepstream app

I am getting following error like

Failed to load plugin '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/deepstream/': cannot open shared object file: No such file or directory

while running DS like

deepstream-app -c ./source4_720p_dec_infer-resnet_tracker_sgie_tiled_display_int8.txt

I have installed following version of cuda and tensorRT
TensorRT 5.1
please help me out.

Please upgrade to CUDA10.1 and try again.

Actually I am using DS-3 that’s why i had downgrade my cuda-10.1 to cuda-10.0
DS-4 was running well on this system but i had to use tensorRT5.1 so i switched from DS4 to DS3.