Hi Shahzada, welcome
Please review How to get help on the Dynamo Forums
The image is too low res and cut off. In Dynamo please zoom in so the Graph is readable and take a snapshot of the workspace using the tool in the top right corner - this will capture everything
If you are able to attach the Dynamo file and a minimal example Revit file that would help or otherwise a link to online storage like dropbox, OneDrive, Google Drive, etc.