Hello,
thank you for your reply. I switched my website from HTTP to HTTPS not so long ago, that’s correct. Thank you for pointing this, I totally forgot to change the website settings in the wordpress administration panel, I really don’t know why I did this mistake.
After turning off all the plugins and re activate them one by one, it seems that the Really simple SSL extension was the culprit.
I will also investigate about the the Open Graph tags, I guess it could be confusing more than anything else to have both the theme tags and Yoast tags.
thank you, I will post there indeed.