Over the last week, my site has not been working well with Facebook. At first, images weren't being displayed when sharing posts on Facebook even though the debugger tool detected them. Today, the debugger couldn't even access the url and the scraper couldn't load more than a few lines. Then I got a 403 error when I tried to add Facebook Admin with Yoast SEO plugin. I thought maybe the .htaccess file generated by W3 was creating access problems so I disabled W3 and now everything is working fine again.