After the WPSEO update all of my websites category links are broken. They resolve to a blank page when WPSEO was active and result in a 404 error when WPSEO is not active. I have tried stripping/adding the category in the url using WPSEO and/or permalink settings within wordpress but does not help. I have site in maintenance mode so please contact me if you are able to take a look at the issue. Thank you.