A Microsoft file hosting and synchronization service.
Hello,
I tried again this morning and it now appears to be working again in my web browser (Chrome). It now says "loading" instead of just a blank white screen, then after a few seconds it opened my Personal Vault.
The only issue that still persists is that when I am in the app on my android phone (Samsung) and I go into the cog wheel and choose "Options" and try to click on "Personal Vault" - it wont do anything. The options is working through the web browser, but still not in the app on my phone. Everything else seems to be fixed otherwise.