1. I already have facebook API generated for a different module that I use in my opencart 2.2 default theme. So instead, I added the subdomain with the link you provided. Is that the right way to configure?
2. I also selected the http in the oneall admin panel. However, it still does not help me register on my website via facebook since I do not have SSL and it says the site is not secure and instead takes me to my host site with options to choose webmail, cpanel etc to login since it says the certificate is for my host.
Would appreciate valuable inputs.