"Script error encountered when changing this field - please contact your System administrator" while changing a field on the formSummary"Script error encountered when changing this field - please contact your System administrator" error occurred while changing a field on the formInstructionsThe above error is very generic error and there can be many reasons for the cause.But in this situation, the error is caused by a code in custom Client script in customer instance which is using Number.Integer() in the script. The issue is seen only in IE 11 browser.Number.Integer() does not work in IE11, so we can suggest to use below poly fill instead.=====================Number.isInteger = Number.isInteger || function(value) {return typeof value === "number" &&isFinite(value) &&Math.floor(value) === value;};===================Related LinksRefer documentation:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger