Missing Icons and Assets, with Script Errors
Environment
| Product | Progress® Telerik® Report Server |
| Product Version | 11.1.25.521 |
Description
Report Server unexpectedly stops showing icons, throws script errors, or has lost whitelabeling features.
Other symptoms may include script errors in the browser console, such as:
Uncaught Type Error: Cannot read properties of undefind (reading 'getLocalizatoinString')Failed to decode downloaded font: host/Contentfonts/TelerikReportServerFont.ttf
You may also see 404 errors for script and asset links in the Networking tab of the browser DevTools window.
Possible Cause
If the server's IIS setting were reset, either through a Windows Update or other OS operations, that stop allowing access to static content inside the application folder. Some of those assets are image files and JavaScript resources, which results in client-side issues as described above.
Solution
Re-enable IIS and reselect all relevant features, especially Internet Information Services > World Wide Web Features > Common HTTP Features > Static Content. Use the following screenshot for guidance:
After fixing the IIS settings, if your white labeling customizations are still missing, disable the Whitelabeling, then reenable it (and reapply customizations).