Hope you are doing well and thank you for addressing your concern, from what i see this happens when the published link is deleted, i would suggest you to check whether the published link is still available, you can do that by clicking on the "Manage Links" in home screen.
@UX5E8B , There are 3 types of links the person who shared the link to you can generate for AdobeXd wireframes. They are as below
1. Only specific users
2. Anyone with a link
3. Anyone with link and password.
I've personally had this problem when someone publishes a link with the option-1 as above. The way with which the companies policies recognize a user can be different there by not even allowing the "specific" users as set by the person sharing the link to access the page.
Can you ask the person who shared the link to you to republish the wireframes again to adobe cloud with the option-2 as stated above.?
Please lemme know if the solution works for you else we can try other solutions.