Hello Kudrati,
We noticed that in your WP General Settings, the Wordpress Address and the Site Address URLs are defined without the www prefix (http://sheeshagardencafe.com). However, in the Instagram settings your Redirect URI has the www prefix (http://www.sheeshagardencafe.com/...).
Please make sure the Redirect URI in both the Instagram Application Config and Easy Instagram plugin have the same base URL, in your case without www, or change your site URL to include www.
Thank you for helping us to find the source of this issue.