DeepStream SDK

I installed Deepstream SDK on my Jetson Nano by following the steps of Github repository. I am working on object detection model. While running the deepstream app, it is getting error.I am enclosing the screenshot of error which i got. Pease can anyone help me to sort out this error. Thankyou in advance.

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU)
• DeepStream Version
• JetPack Version (valid for Jetson only)
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

Hardware - Jetson Nano
DeepStream Version - 5.0
Jetpack Version - L4T 32.4.4
TensorRT Version -
Cuda Version - 10.2.89
CUDNN Version -
Cuda Architecture - 5.3
OpenCV Version - 4.1.1
Kernal Version - 4.9.140-tegra

You can run it from desktop if you want to see the output from display, or you can run from remote client, before run the sample, run this before,
export DISPLAY=:1 or 0
xrandr //to check if screen exist
if you use sample deepstream-app, you also can choose other sinks option like File or rtspstreaming in config file.