You might be interested in:
- Xposed General: for general issues with the Xposed framework/installer.
- The relevant module's thread: if you're asking about a specific module, search for its thread here and ask in the relevant thread.
- Index/Requests thread: if you're looking for a specific module or want to request one, post here.
- Android Q&A: for general questions (it's usually best to post in one of the threads linked above, but off-topic threads will be moved to Android Q&A).
- Your device's Q&A forum: for questions other users may be able to help you with (e.g. "Will Xposed run on my device?").