I am using SDL Web 8.5 after adding a UI model extension in the System.config file located in %Tridion Home%\ Web\web\WebUI\WebRoot\Configuration\ The CM is unable to load in Internet Explorer version 11 however the CM loads in Chrome and Firefox browsers.

When I inspect the network tab I see a few 401 errors there. Errors in the Network tab There are no errors in the console tab.

I also made sure to configure the browser for the Content Manager

Any thoughts?

  • Are you seeing the same URL requests (but successful) in other browsers? Have you any plugins installed on browsers that my be effecting this? Assuming you've cleared cache for the CM and in the browsers? What is the GUI extension doing in general? Dec 4, 2019 at 13:18
  • the same URL requests are successful in Chrome and firefox. I cleared cache for them CM in the IE browser as well as disabling all the addons but that didn't fix the issue. The UI Model extension displays a warning notification when a component is saved with unwanted strings. Dec 4, 2019 at 15:27
  • I could be issue with somewhere tagged are not closed properly?
    – Velmurugan
    Dec 5, 2019 at 9:12
  • AS per Velmuurgan's comment - IE is a lot less forgiving ... I would check the XML config files (often just browsing them in IE itself will highlight if IE has an 'issue' with them). Dec 5, 2019 at 13:20
  • I checked the xml config files i added and they have no errors in them. Dec 10, 2019 at 13:40

1 Answer 1


One of the JS files in the UI Model had code which included the backtick similar to this;

 var description = `Item '${event.data.details.title}' has finished with status '${event.data.details.state}'`;

I Changed this to the following getting rid of the backtick

var description = "Item" + ${event.data.details.title} + "has finished with status"+ ${event.data.details.state}";

and that fixed it. The backtick syntax for a string which allows for interpolation of variables within a string is not supported by Internet Explorer 11

  • Thanks for sharing the answer too! You should 'accept' it too so it is officially the solution to your question :) Feb 20, 2020 at 9:45

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