Invalid server SSL certificate

 why invalid server SSL error occur

 

This error occur because of

Search Console itself is trying to open https://www.xyz.blogspot.com/robots.txt 

while Blogger subdomain sites don't support www - that's the real cause of the SSL error

 and indexing error!

Error fix-

So don't use www in url prefix  use only 

 https://xyz.blogspot.com 

Please comment if your error has been resolved.

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