I use the Wordpress plugin and when I click Statcounter in the left menu it ask me to login all the time.
The cause of this is usually because the browser is blocking the statcounter cookie which tells our site that you are logged in.
- Safari : Go to Safari menu > Preference > Privacy then uncheck "prevent cross-site tracking". After that close the settings windows and reload the page asking you to login, it should show the stats.
- Firefox : While you are logged into Wordpress and seeing the statcounter login page look at the address bar and there is a little blue shield icon to the left of the web site address / URL (to the right of the home button). Click that and a popup shows, in that click the toggle for "Enhanced Tracking Protection is ON for this site". After that the page will reload automatically and the stats should show as normal.