cloud9, cannot link js file to ejs

Question

I am new to server programming.

I cannot get the bootstrap js files to link to my ejs file. I am trying to link the js files to index.ejs.

I have this code:

<script src="jquery.min.js"></script>
<script src="popper.min.js"></script>
<script src="bootstrap.min.js"></script>

They are in the same original folder, so why doesn't this work? Thanks for your help

Screenshot of the situation