Why can't I add pattern swatches to my Dolores Bags online store?

Hi, my name is Carolina
I have a shopify shop, its name is Dolores Bags
I’m having problems in the online store, I always add some assets, manually, the swatches of the patterns. Since yesterday I can’t do it, it always tells me that there is a system error, to try again. It is key for me to be able to solve it, because if I do not add those swatches, my clients cannot choose the pattern of the product. Could you help me?
Thks in advance