Newly, I experience a weird issue on my website: when CF is active Google cannot fetch or retrieve any files and I should pause CF to let Google update the sitemap or index images or documents. I use CF free plan and no special rules are set for firewall or other parts, also disabling firewall or development mode couldn’t help. Other search engines like Bing have no such a problem. I really need help solving the issue.
You didn’t post the specific error, but others have:
https://community.cloudflare.com/search?q=google%20crawl%20error
1 Like
The exact code of error is 403. Regarding posts in mentioned url I’ve found that it would be an issue in very core of CF firewall, kinda related to 100035.
update
Here is a so-so solution for premium users:
update
I found Googlebot IP ranges and tried to allowlist them, but no chance for free plan. Hope CF staffs do something ASAP.
update
Many people have the same issue mostly during recent months, I think it’s serious. For instance:
https://support.google.com/webmasters/thread/20887285?hl=en
I hope CF cope with the problem.
2 Likes
Found no solution at last, except quit using CloudFlare 
This topic was automatically closed after 14 days. New replies are no longer allowed.