It’s so strange because with the Browser Preview extension installed I don’t receive the error message; however, Live Server opens in the Browser Preview extension, when installed and enabled (like below), but then that means it doesn’t open in the Chrome browser.
It seems like when the Browser Preview extension is disabled or uninstalled, I receive the error message below.
At least I know now that I have Browser Preview (as a backup) and the ability to manually put the localhost IP and port 5500 into the Chrome browser address bar (with Live Server enabled); these seem to be nice alternatives to Live Server just opening automatically in the Chrome browser. Thanks again for your help on this.