I got an email from Google Search Console Team sc-noreply@google.com, saying:
Page indexing issues detected in http://sprechcomputer.de/
To the owner of http://MYDOMAIN.de/:
Search Console has identified that your site is affected by 1 Page indexing issue(s). The following issues were found on your site. We recommend that you fix these issues when possible to enable the best experience and coverage in Google Search.
Top issues
Crawled - currently not indexed
Fix Paging Issues
I visited Search Console, and it said: "robots.txt fetch failed" You have a robots.txt file taht we are currently unable to fetch. In such cases we stop crawling your sited until we get hold of a robots.txt, or fall back to the last known good robots.txt file.
I visited my website, but it doesn't have a robots.txt file, and to my knowledge, it never had.
How do I fix this problem?
In search console, I tried to investigate the problem further:
And then I see this:
My server looks like this:
