Twitter has opened access to Analytics for all users. However when you use an Ad Blocker, like Adblock Plus, you’ll get the following error:

A problem occurred while loading the page. To use this site, you need to disable AdBlock or any other ads-blocking extension you are using, or customize it to show ads on this site

For Adblock Plus you can fix this by adding a filter: go to Filter Preferences and on the "Custom filters" tab add a new filter within a filter group (or create a filter group for this rule).

Use this as a filter rule:

@@||ads.twitter.com/stylesheets/ads-allow.css

SNAGHTMLea2974c

And don’t forget to Enable the rule!

EDIT: Twitter user @Ertraeglichkeit mentioned a different method:

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