I have several sites that are missing these files. This is causing errors on the browser console. Also, I think this is causing errors with my host and our WP REST API, but I digress. /wp-content/plugins/meta-box-aio/vendor/meta-box/meta-box-builder/assets/js/popper.min.js.map
It's a JavaScript Source Map, and is meant to be included with popper.min.js, for the browser.
I've been trying to track down errors with my host, WP Engine, and this bug is one we're trying to knock out.
The JS source map file is used to debug the error easier, it does not cause the error on your site. The popper and tippy js files are the library of Bootstrap so I think there is a plugin or block of code that conflicts with the code in those files.
.
