Given URL is not allowed by the Application configuration

Hi,
Inside facebook planner, When I click on ‘Authorize’, it redirects to facebook with this error. I have setup the app on facebook, provided website url as example.org , oauth redirect url as example.org/psp_seo_fb_oauth , example.org added in app domains , add platform->site url included example.org . So there’s no subdomain & this is the issue from production server, not localhost.

Would appreciate your help.

Thank you

https://wordpress.org/plugins/premium-seo-pack-light-version/