blank media selection dialog - MVC Selector

Hi All,

I'm using media selector for selecting image in a custom widget. Below is the code we used to declare a widget propety in widget properties.

 [EditingComponent(MediaFilesSelector.IDENTIFIER, Order = 0)]        
    [EditingComponentProperty(nameof(MediaFilesSelectorProperties.MaxFilesLimit), 1)]
    public IList<MediaFilesSelectorItem> Image { get; set; }

I'm getting a blank dialog when clicked on 'select' in widget configuration. please check the below screenshots. I'm using 12.0.31 kentico version.

Also I'm getting console errors related to 'mediaDialog' (refer the 3rd screenshot).

Help us to resolve this issue.