Not able to connect instagram

Trying to use linkedin auto publish at my guest blogging site, but its showing error and authorisation fails.

screenshot:

https://drive.google.com/file/d/1Rnrj3Y3vtxg5CMAOVL6Rhu4C5zuK-yPQ/view?usp=share_link

https://drive.google.com/file/d/1H2I1P6mrOc9gPLaXAALEHY-SZr9FVJx5/view?usp=sharing

The page I need help with: [log in to see the link]