Thanks for reaching out and sorry to hear about the trouble.As you have mentioned you are stuck at loading XD shared file but In the screenshot you are trying to open shared prototype link so I assume you are having Issue while loading shared prototype link. To Investigate more on your Issue, I'd request if you can share a few more details like:
The version of Adobe XD.
Is this happening with a specific file or with multiple files?
Have you tried loading the link in any other browser?
Are you connected to a private network or managed work network? If connected to a managed network please try switching to a different network?
Will it be possible for you to share the link so that we can test it on our end?