from the time I 've changed my DNS to Cloudflare website for free SSL, I have many times errors. Now I have the 525 error but the problem is that I cannot also verify my ownership in Webmaster tools.
(I don’t know why is keep asking me these verifications though, I 've verified it in the past and still keep asking me)
So, what do I do now? I have this error and I also cannot visit my site…**
When you transition to Cloudflare, your actual web server is still hosted somewhere else. CF just provides the CDN/SSL/etc. Since you’re on GoDaddy, you should go to the SSL/TLS app and set SSL to “flexible”.