How do I fix indexed though blocked by robots txt in Blogger | Blogger error robot text files 2021

Google has marked these URLs as “Valid with warning” because they’re unsure whether you want to have these URLs indexed. In this article you'll learn how to fix this issue.

Normally, Google wouldn’t have indexed these URLs but apparently they found links to them and deemed them important enough to be indexed.

Export the list of URLs from Google Search Console and sort them alphabetically.
Go through the URLs and check if it includes URLs…
That shouldn’t be accessible to anyone, ever. Take for example, a staging environment. In this case, follow the steps explained.