The hypercube results are too large message essentially means that Qlik Sense is limiting the size of the response to prevent a non-responsive engine and/or browser when handling large data sets.
(Recommended) Limit the data set. It is an intentional security limit so the user does not query for too much data in the hypercube.
(Not recommended due to stability concerns) / Not a supported config option: Modify the Settings.ini value for MaxSizeOfResponse to allow a larger than default response which will visualize the data. The default value is set to 20971520, which is 20*1024*1024.