Activities Module not displaying any data on screen

Activities Module not displaying any data on screen

for the last week or so the Activities Module keeps going blank and then will not display any data at all. Attempts to select a different view within the dropdown list fail as well, will not even make the selection. All attempts to refresh screen, navigate away and back and/or log out and log back in fail to produce any data as well. Currently only way to see activity data is to generate via Reports module. 

Please advise