Increasingly often, some web pages do not come up in Brave. And these are pages that are showing with Shields Down. When this happens, I have to quit Brave and restart. Then the pages appear. And these are not simply odd pages here and there; here is a Youtube video page that only presented me with a blank page. Once I restarted Brave it came right up.
Brave Version 0.63.48 Chromium: 74.0.3729.108 (Official Build) (64-bit)
Extensions installed: Save to Pocket and 1Password