How to Resolve the Cef Sharp Error

What the Error Means

If you see a CefSharp error (for example, an “Unhandled exception” message when you open the program), it means your computer is missing a Microsoft file that the software needs to display some screens.

What CefSharp Is

CefSharp is a component that allows Windows programs to show web-style pages inside the application. Many parts of Navigator use it to display modern, interactive views.
If CefSharp cannot start properly, some parts of the system may not open or may appear blank.

Why This Matters

CefSharp is essential for running some screens in Navigator.
If this file is missing, you might not be able to access key areas of your system. Installing the correct Microsoft package restores these screens and prevents further errors.

What You’ll See

You might notice one or more of the following:

• “Unhandled exception” messages when opening the program

• A blank white window where a screen should appear

• An error mentioning CefSharp or Chromium

• The application closing immediately after opening

How to Fix the Problem

1. Close Navigator completely.

2. Download the missing Microsoft file using the link below.

3. Run the installer.

4. Follow the on-screen instructions until the setup finishes.

5. Restart your computer if asked.

6. Open Navigator again to check the error is resolved.

Download Required File

If the Error Still Appears

Try the following steps in order:

1. Repair the Microsoft install

   • Open Settings > Apps.

   • Find Microsoft Visual C++ in the list.

   • Choose Modify, then Repair.

2. Run Windows Update

   • Install all pending updates and restart your PC.

3. Check antivirus settings

   • Make sure your antivirus hasn’t blocked or deleted any CefSharp files.

   • Add the Navigator folder as an exclusion if needed.

4. Reinstall Navigator

   • Uninstall it through Settings > Apps.

   • Restart your computer.

   • Download and install the latest version.