If you are developing new site, you have probably locked it through htpasswd. When you are done with og meta data, you might want to check it with https://developers.facebook.com/tools/debug/sharing/ – but facebook won’t be able to access your content, because you can’t give it your password.
You need to update your htaccess, from
AuthUserFile /.htpasswd AuthName Disbait AuthType Basic Require valid-user satisfy any deny from all allow from 127.0.0.1
SetEnvIfNoCase User-Agent "^facebookexternalhit" facebook SetEnvIfNoCase User-Agent "Facebot" facebook SetEnvIfNoCase User-Agent "Twitterbot" twitter AuthUserFile /.htpasswd AuthName "Restricted Access" AuthType Basic Require valid-user satisfy any deny from all allow from 127.0.0.1 allow from env=facebook allow from env=twitter