Should be visible in the source code. Otherwise provide a link to the page.

The issue is about no anchor text. With anchor text links you can see the link in the text but the issue is there is no text but there are links being redirected to other...

If you know what an anchor text is? Solving shouldn't be too hard? Otherwise read first about anchor text

Can PageRank drop significantly after server error? Yes, it's the perfect recipe for a 100% bounce rate. A signal for Google your content isn't what people are looking fo...

the Drive file doesn't seem to be publicly available... just saying

A semantically accurate URL is the best. There's nothing wrong with yours.

Thank you for your respond. So what you are saying is, that if products descriptions are very alike in lot of cases, because the products are similar, it is not taken as...

Did you check your robot.txt?

An overview of recent updates: https://www.seroundtable.com/category/google-updates

All these things were reviewed, but no such issue was found to be responsible for such a drop. Is there any update from Google for e-commerce websites?