Commencez par verifier le whitelisting des domaines. Mais je ne vois pas comment FB autoriserai l'utilisation de ce plugin sans SSL.
www.adampatterson.ca/2018/quickly-add-th...plugin-to-your-site/
Next head over to your Facebook page and click on Settings / Messenger Platform. You will need to link your app to your page.
After that make sure to Whitelist your domain name. An HTTPS connection is required to use messenger. If you don’t have HTTPS then I would highly recommend a service like Cloudflare, You can get free SSL without any fussing around on your server!
- Need help? Post the URL of the related page (eventualy as confidential info), it will help solve your issue faster.
- An error, notice or warning? report the exact message including the line number
- If you get a white page , enable error reporting and / or check your server error logs.