Form Submit in jsp and servlet doesn’t work when Bootstrap’s js file is added

Without js the login form works but if I add the js(Bootstrap CDN) login doesn’t work.

this is the js script tag:

<script type="text/javascript" src="https://mdbcdn.b-cdn.net/wp-content/themes/mdbootstrap4/docs-app/js/dist/mdb5/standard/core.min.js"></script>

If I remove this some of the styling disappears. What to do

I tried the latest js cdn still doesn’t work. I think I have to choose between bootstrap or servlet.