Hello,
I have a subdomain
https://poczta.mczajkowski.pl and until now it has been indexed at this address for many years. After updating the email program, she suddenly disappeared from the search engine.
I did not notice the errors of the updated program, so I started to rummage in the console, but I also did not find the reason.
I added in the console hearts, additionally sitemap.xml pages, and only Google has crawled it and sees after the entry "site" which I'm rather not satisfied with.
The page in index.html has follow and robots.txt file so that the search engine can see it.
The console screen even disappeared, which was previously visible there. And in the item "Status" it appears as an excluded scanned, but not indexed
Is anyone able to tell me what happened and why after a few years the site suddenly disappeared from the search engine?