'Clean Browsing' prevents access to sites

Hello,
I am regularly stopped accessing sites with a page saying the site isn’t secure/ verified, and an option to proceed anyway.
But on clicking on that ‘proceed anyway’ results in this page 'Clean Browsing… Website address… Your IP… ’ that stops me again, with the note ‘contact your administrator’.
Well as I’m on my private phone and its not my website I don’t have an administrator to contact.
What is this about? I have been searching but not finding any answers.