When opening https://demo.matomo.org/index.php?module=Overlay&period=month&date=today&idSite=62#?l=https$3A$2F$2Fdivezone.net$2Fdiving$2Fbali$3F__enterprise_demo$3Ddemo.matomo.org$26__enterprise_demo_idsite$3D62 in a fresh browser (
chromium --temp-profile, Version 83), the page overlay is stuck on loading.
The console shows
Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.
According to https://www.chromium.org/for-testers/bug-reporting-guidelines/uncaught-securityerror-failed-to-read-the-localstorage-property-from-window-access-is-denied-for-this-document this is caused by the
Block third-party cookies feature.
Is there maybe a way to make the feature work without accessing localstorage across domains?
If not, then this should be documented and show a proper error message.