Summary
My Settings page went blank on my brave browser after an upgrade (nothing to do with HA) but I verified that I can enter the Settings page on a chrome browser. I even did two updates. I then went to site data on my brave browser and I deleted the http://homeassistant.local:8123 data. Afterwards, I log back in but still can’t see the contents of the http://homeassistant.local:8123/config/dashboard page. I think there is still another cookie somewhere that I need to delete.
Okay, I opened the developer tools on the brave browser and reviewed network section. I saw some 404 errors for the disk cache so I disabled it from that window. The page successfully reloaded. I then reenabled the disk cache and it seems to be working.
if you haven’t tried, next time try to hold down the refresh button of your browser when in developer tools, then you can then select “empty cache and hard reload”, this usually fixes cache related issues.