google giving error message on site

HI,
A client just sent me the following for his wordprss site. Can you please tell me what is causing it?

PageSpeed Insights mobile performance
We’ve analyzed how well your pages with the highest number of ad requests perform on mobile devices. Improving the performance of these pages can lead to an improved experience for your users and increased traffic and earnings.

Analyzed pages:
http://www.homefrontmagazine.com/
http://www.homefrontmagazine.com/been-there-done-that-how-to-fight-feelings-of-complacency/
PageSpeed Insights desktop performance
We’ve analyzed how well your pages with the highest number of ad requests perform on desktop computers. Improving the performance of these pages can lead to an improved experience for your users and increased traffic and earnings.

Analyzed pages:
http://www.homefrontmagazine.com/
http://www.homefrontmagazine.com/been-there-done-that-how-to-fight-feelings-of-complacency/