Take a look
What should we be looking at?
Try running the test again without ad blocking software maybe.
Everything works for me except Google complaining about itself… [www.google-analytics.com] Not sure what we are supposed to fix here?
Confirmed, I couldn’t reproduce the errors you were getting, @colomet.
I did test at pressbooks.com.
in my testing book of your site
the last mistake is not about pressbook-book?
As @dac.chartrand noted, you have browser extensions installed that are messing with the results. I ran this test on the same URL, and I got the following results:
Again, the only error we are getting on the same exact chapter of your book is something about Google Analytics.