JS error on create token modal

[hawkinslabdev]

Uncaught TypeError: can't access property "style", modal.querySelector(...) is null
openCustomFieldsDialog https://beacon-demo.melosso.com/js/admin.js:466
onclick https://beacon-demo.melosso.com/admin?view=new-token:1
6 admin.js:466:13
openCustomFieldsDialog https://beacon-demo.melosso.com/js/admin.js:466
onclick https://beacon-demo.melosso.com/admin?view=new-token:1