Just noticed that the extension is throwing 2 console errors in the backend:
Uncaught ReferenceError: Hash is not defined
at modal.js?ed8ea6bf6f218c05e564191c983f5fff:7
Uncaught TypeError: Cannot read property 'initialize' of undefined
at i (jquery.min.js?ed8ea6bf6f218c05e564191c983f5fff:2)
at Object.fireWith [as resolveWith] (jquery.min.js?ed8ea6bf6f218c05e564191c983f5fff:2)
at Function.ready (jquery.min.js?ed8ea6bf6f218c05e564191c983f5fff:2)
at HTMLDocument.K (jquery.min.js?ed8ea6bf6f218c05e564191c983f5fff:2)
I am on the latest joomla and no other extension is showing errors.