Hi Harshika, Thanks for replying. Someone in my IT department helped me yesterday, not sure what all he did except that it involved several reinstalls and reboots, but now XD is working for me again.Thanks.
Sorry to hear you are having trouble opening cloud documents in XD. Would you mind confirming if you're able to open your cloud document from here: https://assets.adobe.com/cloud-documents? If so, please share the screenshot of your about XD info page.