Give us more information like the version of XD, any error messages, OS platform, and if possible some screenshots of the issue.
Also please click on notification bell in you CC App Manager and check if your cc files sync worked correctly. Sugn up and sign in back in your Adobe ID.
Sorry to hear you are unable to create shared link in XD. Would you mind telling us if you're still experiencing the issue? If yes, please share the information asked above.