I’ve had this problem in the past. Items that have helped:
1) Disable web browser AdBlocker software for the site with the issue. AdBlockers block scripts required by Google Analytics.
2) Clear your web browser cache.
3) Use GADWP settings to clear GADWP’s own cache.
4) Look through your website’s plugins to find those that add features to the dashboard area (you called this the ‘cockpit’ in your question). Disable them one-by-one and reload the dashboard each time you disable one of the plugins. Do this to see whether one of those plugins prevents the display of the Google Analytics widget in the dashboard. If one of the plugins does interfere with the display of Google Analytics in the dashboard, reactivate the plugin and see whether you can disable the display of that plugin’s own dashboard widget through the “Screen Options” tab that shows at top right of the dashboard page.
One of the above 4 suggestions usually solves the problem. Hope one or more of them helps you.