Strange issue, my Bootstrap is not functioning correctly on macOS, but works fine on Linux Ubuntu (on my other laptop).
Attached below is an image showing the file hierarchy.
https://i.sstatic.net/9mGyp.png
Below is how I import Bootstrap in my code (imported it in my "komentar_tampil.php" file). https://i.sstatic.net/AvyDQ.png
Thank you for your attention and any assistance!