I have verified that the .map file doesn’t exist in the plugin installation and is not present on my server in that location which is the same location as the backbone.epoxy.min.js file.
I am having the same problem and have cleared cache and done a hard refresh. Same visual results as the screenshot from @nikelaos above. There are a couple javascript errors on the page.
Error: No select2/data/ruaAdapter in select2.js @ line1415
Failed to load resource: the server responded with a status of 404, …/wp-content/plugins/restrict-user-access/lib/wp-content-aware-engine/assets/js/backbone.epoxy.min.map
