A Microsoft file hosting and synchronization service.
Hi, MartinDavidson999
Thank you for using Microsoft products and posting them to the community.
I understand you're having trouble with "Can't access OneDrive Personal Vault." I understand the problem and would like to help you better in your situation.
If it's convenient, could you share with me screenshots of the specifics? Like that white window for example.
Based on your description, this could be a network issue. You can try to change the network or change the network to a hotspot linked to your phone and see if the problem occurs.
Looking forward to your reply.
Best regards
Aiden - MSFT |Microsoft Community Support Specialist