Facebook: Invalid OAuth 2.0 Access Token
Please note
Please keep in mind that we're not affiliated with Facebook company.
Please get in touch with the Facebook support team if you have any issues with Facebook services.
It is a unified guide for all Social Stream Apps, including Flow-Flow for WordPress, Grace, and all upcoming streaming apps. Here and below, any mention of a Plugin or Social Stream App means one of the apps or plugins listed above.
Some Facebook feeds can stop to work with the Invalid OAuth 2.0 Access Token error. This can happen with public pages which are using the New Page Experience.
If this case, please try to use the page title (name) for Facebook feeds. For example, NASA - National Aeronautics and Space Administration instead of just nasa; or National Geographic instead of natgeo.
Also, you can try to re-authenticate with Facebook to make sure you have an active API token used.