What is “page URL not defined” in the Pages report?
Piwik PRO provides two reports for your page views: Page Titles and Page URLs. In some unusual cases (generally caused by privacy reasons) if Piwik PRO couldn’t request the page URL from the browser, it will be reported as “page URL not defined” for the visits on those pages.
If all your pages report “page URL not defined” then there is a data tracking issue. In that case, please contact us on firstname.lastname@example.org and we will try to help you solve it as soon as it’s possible.