I have an issue with Ultimate Seo URL's. I have a cart that was fine until this weekend, when we made some changes to some categories. Now, some categories return a blank page:

https://www.b e l m e t r i c .com/index.php?main_page=index&cPath=15_147_1158

Sub-categories and products show up in admin, but links to them fail in the store with a white screen. Searches for model do work ("cm8ss")

Any ideas?

(Z 139h, UltSeo 212)