MrEliasen added a post in a topic: Read That Topic/Announcement
I am having this exact issues as well. I may be able to add more details about this issue.
It keeps redirecting me to the <forum-url>/index.php?showannouncement=&f=0
It looks like, no matter what you choose, it will always try to redirect to a forum announcement rather than a topic.
I have a custom theme, it could be the mod does not implement well with third-part themes?
I hope this helps you to fix the issue.