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Norton Core - Can't block previously allowed website(s)
I saw another thread on this subject that was marked resolved. It appeared to be resolved by the other poster resetting his/ her router to factory settings and going through the whole setup process again.
I had the same problem--it is a known issue. If you allow a website, you cannot delete this site from the list of allowed sites. Therefore, Norton Core will not allow you to block the site.
As with the other poster, the only way I was able to resolve was to factory reset my Core and set it up again. I am now able to add the website to the blocked sites.
Norton won't block access to the site but I'll save that for another post.