We have a mutual customer that has started having issue logging into their OneDrive account using Okta from our Xerox Multifunction Printers. Upon analysis we see that you have either started using ES6 features (notably Const but likely more) or removed polyfills that would be required to use these features on older browsers. Our embedded browser on many of our devices only support up to ES5 (5.1). We suspect this change was likely removal of support for Internet Explorer. Even though we are not IE, we do require some of the same polyfills as IE did in order to work with these newer javascript features.
For reference, our embedded browser is Webkit based with some features added by us for use on our devices. It is webkit compiled with QT version 5.3.1. Using the Demo browser that cale with that version of QT will give a pretty good representation of our capabilities.