Hi,
this issue would happen when your cubic images are very large(width and height).
you have to use multi-resolution droplet or use smaller images for mobile and tablet.
please notice, I am speaking about the width and height of the image, not file size.
Thanks for the answer. I will try to use multires. Is this possible using krpanotools command spheretocube?
Is case of makepano command, is there a way to generate only the images and not the whole xml, html and other files?