Jonas Lindau
Oct 20, 2009
  5774
(0 votes)

Error 500 when using advanced fileupload (drag and drop)

If you are using Themes in your EPiServer CMS templates, chanses are good you cannot use the drag and drop functionallity in EPiServer File Manager.

Lets say you create a theme called myTheme. Then you’ll probably add this to web.config’s pages-element instead of add it to all templates.

<pages theme=”myTheme”>

After adding this to web.config, drag and drop stop working. You can easily solve this by adding a pages-element to your UI-location:

<location path=”UI”>
    <system.web>
        <pages theme=”” />

 

Now you can start dragging thoose files :)

Oct 20, 2009

Comments

Please login to comment.
Latest blogs
AEO/GEO: A practical guide

Search changed. People ask AI tools. AI answers. Your content must be understandable, citable, and accessible to both humans and machines. That’s...

Naveed Ul-Haq | Feb 17, 2026 |

We Cloned Our Best Analyst with AI: How Our Opal Hackathon Grand Prize Winner is Changing Experimentation

Every experimentation team knows the feeling. You have a backlog of experiment ideas, but progress is bottlenecked by one critical team member, the...

Polly Walton | Feb 16, 2026

Architecting AI in Optimizely CMS: When to Use Opal vs Custom Integration

AI is rapidly becoming a core capability in modern digital experience platforms. As developers working with Optimizely CMS 12 (.NET Core), the real...

Keshav Dave | Feb 15, 2026

Reducing Web Experimentation MAU Using the REST API

Overview Optimizely Web Experimentation counts an MAU based upon the script snippet rendering for evauluation of web experiement. Therefore when yo...

Scott Reed | Feb 13, 2026