When clicked on the Expand All icon on the grouped lists on dashboards, the grouped elements does not expand with the following/similar error in the browser console.

Uncaught TypeError: Cannot read property 'getAttribute' of null
    at e.toggleGroups (js_includes_listv2.jsx?v=09-05-2019_1536&lp=Mon_Sep_23_21_10_16_PDT_2019&c=5_59:695)
    at HTMLBodyElement. (js_includes_listv2.jsx?v=09-05-2019_1536&lp=Mon_Sep_23_21_10_16_PDT_2019&c=5_59:2486)
    at e.handleEvent (js_includes_doctype.jsx?v=09-05-2019_1536&lp=Mon_Sep_23_21_10_16_PDT_2019&c=5_59:14)
    at HTMLBodyElement. (js_includes_doctype.jsx?v=09-05-2019_1536&lp=Mon_Sep_23_21_10_16_PDT_2019&c=5_59:14)

Madrid and Lower

This is caused by not enabling the responsive dashboards on the instance.

Enable responsive dashboards

1) In the filter navigator, type Dashboard Properties
2) Open the Dashboard Properties page
3) Check on Enable responsive dashboard checkbox
4) Click on Save.