SmartCrawl SEO analysis 404 error

I want to run SEO ANALYSIS on my site. I’m using Sucuri firewall proxy for my website.

I have these IP’s already whitelisted:

66.135.60.59

66.135.49.214

66.135.60.64

104.236.238.22

104.236.50.140

But still get the following error on the homepage:

1 URLs that result in a soft error (404 etc)