Sorry you're having trouble. One thing you want to check, especially since you just moved to a paid CC subscription:
Make sure you're signed in to Sketch AND your desktop with the same Adobe ID. It's possible to have the same user name (email address) but have a different password for it; it will show in screenshots as the same ID but is different.
The best way to do that is to log out of Sketch and the desktop and log back in. In the app, tap the Sketch icon and then the field with your name in it. On the desktop, click on the CC ion in your file menu, then click on the Gear icon, then Preferences. After you sign out of both, restart both your device and desktop, then sign back in to both
One quick note: Before you log out of the app, log-in to http://assets.adobe.com (My Assets - Mobile Creations - Sketch) and make sure all your work is synced to Creative Cloud.
Let me know if that solves the not sending.