I would like to finish the Analytics Trails and therefore need to connect my Trailhead with my newly generate "Wave Playground"-Account. Though I cannot click on any of the options within the dropdown menu (see attachment), simply nothing happens when I click on anything. 
Following error message occurs: 
"The 'Trailhead_Data_Manager' app was not found. Please follow the requirements and ensure the wave enabled org is setup correctly."

Would be great if someone knows what to do now? 

Thanks
Angie