SOLVED! (sort of)
Due to personal preference, I had not installed in the root directory. If I navigate to the folder (directory) above where I installed, that's where this "error" comes up. (I *thought* in previous installs I've done I simply navigated to the preferred directory and it would automatically go to the ~/Web location...but I guess that's not the case.) When I navigate directly to ~/Web or ~/Web/index.php locations, the log-in screen comes up.