After successfully creating about 20 new articles, I just started getting errors when trying to create more in AEMM. The errors rotate between "There was an error submitting the article, please try again. The metadata includes emoticons, emojis or unsupported characters. Please remove the unsupported characters. [PersistenceException]" and "There was an error submitting the article, please try again." There are no unsupported characters in my metadata and I've tried several different articles wi...