"There is a JavaScript error in your browser console" error message appears when accessing the Service Portal form.Issue When opening a form in the Service Portal, this JavaScript error displays: "There is a JavaScript error in your browser console".CauseThis error typically originates in a client script that runs on the form. You will have to identify which script it is and troubleshoot from there.ResolutionThe browser developer tool console can provide more details about the error. To open it: Right-click anywhere on the form.Select InspectSelect the Console tab Find the Client script that is causing the issue. You have two options: Update this script to work on both portal and back end views.Write a different script to run only on the portal, and leave the current script to run only on the desktop.Related LinksSome methods are not supported in mobile or service portals but work fine in native UI. Avoid such methods while creating client scripts for the portal. The following product documentation provides more explanation about unsupported methods. Service Portal and client scriptsSupported features in Service PortalGlideForm - Client