Issue

When loading the MetaCompliance Outlook Web Phish Reporter Add-in, you encounter the following error:

Possible Solutions

1. Check if your system is using Microsoft Edge or Internet Explorer to render your add-ins.

Refer to the following Microsoft article for guidance:

• https://docs.microsoft.com/en-us/office/dev/add-ins/concepts/browsers-used-by-office-web-add-ins

1.1 If your system uses Microsoft Edge...

This error can sometimes occur if the Microsoft Desktop App Web Viewer becomes corrupted. To resolve this, reinstall the module:

• Close all Office modules, including Outlook.

• Run the following command on your machine with elevated privileges:

  powershell Add-AppxPackage -register -disable c:\windows\SystemApps\Microsoft.Win32WebViewHost_cw5n1h2txyewy\AppxManifest.xml

• Restart any Office module and load the FYI Add-in to check if the issue is resolved.

If the above steps do not resolve the error, repair the Microsoft Edge WebView2 Runtime:

• On the affected machine, open Control Panel.
• Select Programs → Programs and Features.
• In the list of programs, locate Microsoft EdgeWebView2 Runtime.
• Right-click on it and select Change.
• In the pop-up window, select Repair.
• Check if the add-in now loads as expected.

1.2 If your system uses Internet Explorer

Ensure you are updated to the latest available version of Internet Explorer.
This Microsoft article may assist in ensuring you are on the most up-to-date version of Internet Explorer.

If upgrading Internet Explorer is not an option, try enabling Protected Mode:

• Close Outlook and all open browsers.
• Open Internet Explorer.
• Click Tools → Internet Options.
• Click the Security tab.
• Choose the Internet Sites zone.
• Select Enable Protected Mode.
• Click OK.
• Restart Internet Explorer and Outlook.
• Open Outlook and try to reproduce the error received from the add-in.
• If the issue persists, reboot your computer → reopen Outlook → and try to reproduce the error from the add-in.