First time setting up a secure site with certificates - I kept getting "Not Secure" and Invalid Certs notices on various browsers for three agonizing days. I reached out to the VPSie team and they patently guided me to resources, that I didn't know were required for setting up a secure public site using https/443; letsencrypt.org. They also provided tips on how to setup DNS using their free service at their site. VPSie provides fantastic service - they really want their customers to succeed!