Today I got a email notice from Google that there were search problems with my site. I logged into Google Search Console. It shows that 1 file was being blocked by robots.txt, and has been for several days.
I run the Robots check on that file, it says, "There is no robot.txt file" This is what I expected. So the error message claims that ONE file was un-indexable due to a file I don't have.
If I run 'Fetch as Google' it shows what I expect.
I've submitted feedback to Google.
I've checked other answers here, and so far all have talked about formatting/syntax in the robots.txt file. I've not found the combination of getting a URL blocked when there isn't a robots.txt file.
Why just one file? If it was a temporary service issues, why is it still there 5 days later>
Is this one of those things that just happens, and goes away?