Source map error

Hi, I’m getting the following error in FireFox console log:

Source map error: request failed with status 404
Resource URL: https://e5vrtbqrzpz.exactdn.com/wp-content/plugins/svg-support/vendor/DOMPurify/DOMPurify.min.js?ver=2.5.8
Source Map URL: purify.min.js.map

The page I need help with: [log in to see the link]