Did you also put the resource files on the root of your SD card? These are required! These resource files hold all of the images used and it will not launch if they are not there.How do I open the cia if its not from the home menu? Well at least now I can report you the error properly:
Code:Problem: 0x38 Version 10001a0 Can't load the viewer. Any key to exit
Also, it is possible to launch from homebrew menu with Hans if done correctly... But there's no point to it.