I'm getting a post not found. The URL generated is also

I'm getting a post not found. The URL generated is also weird, http://<mysite>/index.php//wiki/module-container/
Where it's adding the extra slash in there, which I assume is an error/collision with permalinks settings and wiki for whatever reason. Obviously other content works just fine, this is the first time I've seen this, just after installing wiki and attempting to use it.