Hi,
Note that on the listing of carts (wishlists), HikaShop has to load all the products of all the carts (wishlists) on the page along with the different inofrmation necessary to initialize each cart (wishlist).
So if your listing have 20 elements per page, that's 20 carts with all their products, variants, prices, discounts, shipping methods, addresses, payment methods, etc.
That requires a lot of memory.
You can increase the memory limit of your PHP to 256 or 512 instead of 128 and it should help.