Appearance page in SaaS Api Developer Portal is blank in IE 11

Document ID : KB000009255
Last Modified Date : 14/02/2018
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saas portal is showing blank /appearance page in IE 11.

The error shown in the browser's console is  

SCRIPT1010: Expected identifier 
File: main.js, Line: 5100, Column: 12 

The main.js code:

if (process.env.NODE_ENV !== 'production') {
  var REACT_ELEMENT_TYPE = (typeof Symbol === 'function' &&
    Symbol.for &&     
    Symbol.for('react.element')) ||

The error is in line: Symbol.for &&  

IE 11SaaS API Developer Portal

By default, IE displays webpages in the Intranet zone in compatibility view.


- Click on Tools icon in the top right corner of IE (or Alt+X)
- Select Compatibility View settings
- Remove the checkmark next to Display intranet sites in Compatibility View