Thanks for the replies. At least one of you nailed it; Gmail isn't supported on Brave (or Vivaldi, either). I like Brave and plan to keep using it, so I'll just need to go to my Edge or Firefox when I want to access Gmail. That won't be much of a hassle, and it's a good reason to have more than one browser installed. Maybe in the future, I may ditch Gmail and use one of my other email clients so I can use Brave without needing to switch browsers (I have several email addresses already) :C
Thanks again for all the assistance, folks! Ed