If you want to test your exported game before uploading I recommend using Firefox. Firefox is more tolerant when working with requests to the filesystem or, a much better solution is to run a local server. For example apachefriends.org/index.html
Very easy to install and you just have to move your folder to the htdocs folder and all it in any browser with the url localhost/myGameFolder.
But I dislike shifiting folders around. Therefore here is another solution:
If you have installed php you could simple switch to your folder on command line and type php -S localhost:5000.
this will also run a local server listening to localhost:5000 for your current folder.
So you can open your game by typing localhost:5000 in the URL.
Remeber all this methodes are only on your system. Nobody else can access them.
You can read everything in detail here: https://www.construct.net/en/tutorials/publishing-web-10