I am trying to create a pacman game for JavaScript, but whenever I try to upload my files or image script, I get an error message:

The browser I use is chrome and the files are stored in the same directory. I am running CHROME OS, so I can’t just go into files and edit an existing flag.
The same goes for images except the file name. Does anyone know why I am getting an error message Access Denied, or how can I check the files?
Files are uploaded in this format.
<script src="Scripts/gamescript.js"></script>
<body>
<div class="game" id="game">
<img src="/Images/ghosts/red.png" />
</div>
</body>
Upon request, here is my file tree
/Javascript_Pacman_Game/
index.html
/Styles/
stylesheet.css
/Scripts/
gamescript.js
myCustomLibrary.js
setInterval.js
/Images/
/Ghosts/
red.png
blue.png
pink.png
orange.png
scared.png
/GameElements/
board.jpg
bloop.png
superBloop.png
The problem is not the spelling or resolution of the file, and I cannot start the local host due to Chrome OS.