Unfortunately, that is not a service we provide to participants, but you can definitely change that setting. The following links will help the organizer understand the problem and how to solve it.
Try going to this URL: https://developers.facebook.com/tools/debug/og/object/, paste in your community site URL, and click ‘Fetch new scrape information’. This will update Facebook’s cache and that should resolve that issue.
NOTE: As we are not sure if this process works from time to time. Please check this specific support Facebook website in order to know the last details