Crawled site not in index and search returns nothing

Hello,

I’ve selected to crawl , for ex: https://www.xmodulo.com/

I get a green check mark, so I guess it’s ok to proceed.

Crawl depth is 3 and “Restrict to start domain(s)” is selected.

Yet the process of crawling is finished, there’s no entry in my “index browser” and search returns nothing.

Something similar happens for example https://en.wikipedia.org/wiki/ . It says it’s finished but if I do a research that I know exists on that site, it returns nothing.

What could be wrong?