The platform uses googlebot to crawl your site; that is to say that the platform crawls your site exactly as Google does. The most common cause of a crawl error is a robots.txt file that prevents user agents with "googlebot" in the string from accessing the site. The first place to look if the SEO Report Card isn't functioning properly is the robots.txt file. If everything looks good there, your next destination is the source code of your site. Incorrectly implemented redirects can sometimes prevent our crawler from ever moving past your homepage. If this is the case, simply correcting those redirects and refreshing the report should resolve the issue.