I successfully share the prototype online with my colleagues; however, when I clicked on the Manage Links button in XD, it opens the assets page and says "You haven't synced any prototypes yet." And there is no activity, either. Since it is just a prototype and there is some confidential information of the company, I really need to remove it from a public domain (now everyone who has the link can view it). Can someone help me to delete it asap? Thanks a lot
You might be signed in to assets.adobe.com with a different account from Creative Cloud on your desktop. Try logging out of assets.adobe.com and logging back in with the same account you are using on your desktop. Then the prototypes you've shared with that account should appear.
Hope this helps!