I belive you are in the qliksense enterprise and trying to do this on the server .. ? It could be due to the below reasons-
1)Server issues - in which case , it is just taking too long to load - the server admin can confirm if this is what is happening ?
2) Heavy front end expressions - like you are trying to display the entire data set in the front end .. it just processes and never really will finish processing (depending on the size of the data)
- for this , click on open without data .. delete the newly added visualizations and try again
