It's an out-of-sign aspect. Some people here may disagree, but I personally don't count them and think they don't work. Both Pisces and Cancer are water signs, how and why would they work against each other?
But anyway, even if you count an out-of-sign aspect as a regular aspect, I would still say that the orb between your Sun and Moon is too wide to make an aspect. Web default style which is chosen automatically at astro.com sometimes counts aspects that are too wide to have any noticeable influence. For seeing what aspects you actually have, I'd recommend to choose Classical style among other chart drawing styles. It may be a bit too rough on sextiles, but for other aspects it works just fine.
So my verdict is: there is no square between your Sun and Moon.