Yup the 1.17a is the one needed to play. Unfortunately there was an issue on the server side and that .exe is a hot fix, and sadly the download for it off of our site here is a tad broken. Here's a link to a vanilla folder that contains the new .exe already installed: Linkie (https://drive.google.com/file/d/1gXvgzadOoOXNqFfaXWHfEUJ6PeZNwU4R/view)