I have been loading many books and magazines to my store. I have come to the point where nothing can be added to "Shop Section". I get an OOPs try again later.
I have submitted requests to Help and nothing changes.
NM, reread your OP.
Perhaps it is just a glitch.
@HandmadeGiftsBoutiqu" Perhaps you just hit the limit of "20 custom sections" https://help.etsy.com/hc/en-us/articles/360000345048-How-to-Create-and-Manage-Shop-Sections
