webmaster tools 404 errors

Since the beginning of this month (November 2018) I'm having the "content is wider than screen" error for 3 sites in the Google Search Console (they all have their own console, so they don't share anything). These are html websites and are not using any kind of CMS. Error in Google search...

Recently launched Magento web store... Long story short I had to regenerate URLs for products and also adjusted the way our catalog list page URLs were structured (drill down urls, etc). This was all done relatively quickly after site launch, there are no links that I can see pointing to these...