User blog comment:MisterWoodhouse/Introducing the Wiki Analytics Admin Dashboard/@comment-28465878-20190806155614/@comment-36497343-20190806160114

The Special:Insights stuff gives some of the information you get on this page but you can't see other statistics (like Geolocation, for example), and it's better to have all the statistics in one place rather than having a few at Special:Analytics and a few at Special:Insights (and also, normal editors can't see Special:Analytics, so the ones at Special:Insights are for everyone to view).

As for the error, see some of MisterWoodhouse's comments below, seems they're trying hard to fix it, it should be up and running shortly! :)