You need to basically be stock. No system changes. And you need stock recovery.
So, you can uninstall xposed, make sure you haven't removed or altered any system files, and flash the custom recovery.
Or, you can rsdlite back to stock.... The same version you have now....then IF the ota is out for your device, it will prompt you to update.
Or...you can just wait for the sbf files and flash the update with fastboot/mfastboot.
If the ota isn't out for your device yet...then there's nothing you can do but wait.

---------- Post added at 05:14 PM ---------- Previous post was at 05:13 PM ----------
I ALWAYS wait for the files and flash with fastboot. Just my preference.
