Following the upgrade to 0.84.1 the Overview screen and Entities screen were blank. Upgraded to 0.84.2, but that didn’t fix it. There were no errors in the logs.
Reading though various comments they pointed to the legacy password. HASSIO didn’t show any user accounts (although I had created one previously for testing) and I couldn’t create a new user.
Deleted the \hassio\config.storage folder and restarted hassio. Was prompted to create a user, and most of the Overview tab came back. The Philips Hue lights are missing though.
Logged out as the new user, and logged back in as the legacy password. The Overview now has the same entries as the user account, but no lights.
Prior to wiping the .storage folder the upgrade also seemed to have wiped the 2fa config.