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How to Fix the MX Lookup Add-in Cannot Be Loaded Error in Office

WPS Editor Oct 9, 2026 868 views

Question details

The user is trying to resolve an error preventing the MX Lookup add-in from loading correctly in their application.

How to Fix the MX Lookup Add-in Cannot Be Loaded Error

Product: Microsoft Office
Device & OS: not provided
Scenario: Attempting to use the MX Lookup add-in for data processing but encountering a loading failure.
Observed behavior: The MX Lookup add-in fails to load and triggers an error, blocking the user from utilizing its functions.

Before you start

Save your current documents and close any active Office applications, as adjusting system-level internet and script settings requires a restart to take effect.

Solution 1Recommended

Adjust Script Settings in Internet Options and Reinstall

Modifying your system's script debugging settings can resolve add-in loading errors caused by browser scripting conflicts.

Many Office add-ins rely on system-level browser settings to render their interface and execute scripts. Adjusting these script settings and performing a fresh installation often resolves loading failures.

Open Internet Options

Click the Start menu, type 'Internet Options' into the Windows search bar, and press Enter to open the Internet Properties dialog.

Modify Script Settings

Navigate to the 'Advanced' tab. Scroll down to the 'Browsing' section and check or uncheck the script debugging settings as recommended for testing add-in conflicts. Click 'Apply', then 'OK'.

Restart Your Computer

Reboot your computer to ensure the system-level changes are fully applied to all background services and Office applications.

Reinstall the Add-in

Open your Office application, navigate to the Add-ins menu, remove the existing MX Lookup add-in, and install it again from your source file or store.

Adjust Script Settings in Internet Options and Reinstall

Third-Party Origin: Because MX Lookup is a third-party add-in rather than a Microsoft product, script configurations are often necessary to allow it to communicate properly with the host application.

Solution 2

Contact the MX Lookup Vendor for Support

If script setting adjustments do not resolve the error, the issue may be on the vendor's end or related to an incompatible installation package.

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Frequently Asked Questions

What causes the MX Lookup add-in to fail when loading?

This error is typically caused by conflicting script debugging settings in Windows Internet Options, a corrupted add-in installation, or a temporary outage on the third-party vendor's servers.

Is MX Lookup an official Microsoft add-in?

No, MX Lookup is a third-party add-in. Because it is not maintained by Microsoft, any persistent bugs or server issues must be addressed by contacting the add-in's specific vendor.

How do I remove a problematic add-in from Office?

To remove an add-in, open your Office application, navigate to the 'Insert' tab, select 'My Add-ins' or 'Get Add-ins', find the add-in you wish to delete, click the options menu (usually three dots), and select 'Remove'.

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