File Sharing Problems

How to Fix Excel Share Dialog Hangs with Internet Extensions Script Error

Maira Mehtab Sep 21, 2026 869 views

Question details

Users are encountering an issue where the Excel Share dialog spins indefinitely or displays a script error citing an internal error in the Microsoft Internet extensions, often referencing a SharePoint core.js file.

Product: Microsoft Excel
Device & OS: not provided
Scenario: Attempting to share a workbook with other users directly from the Excel desktop application.
Observed behavior: The Share dialog freezes and throws a script error preventing the file from being shared, which can also result in recipients being unable to edit previously shared files.

Before you start

Ensure you have a stable internet connection and access to your Microsoft 365 admin dashboard, as this issue may be related to server-side outages or blocked web components.

Solution 1Recommended

Isolate the File and Permission Scope

Determine if the script error is isolated to a specific file or affects all workbooks to rule out file corruption.

Test with a new workbook

Open Excel and create a new, blank workbook. Click the Share button in the top right corner to see if the Share dialog opens successfully.

Verify local saving

Attempt to save the problematic workbook locally to your computer using File > Save As to ensure there are no hidden file restrictions.

Check recipient permissions

Reach out to users who already have access to the file and ask them to open it. Check if they have Edit permissions or if they are unexpectedly restricted to Read-only mode.

Solution 2

Check Microsoft 365 Service Health and Updates

Widespread script errors often stem from Microsoft 365 server-side SharePoint issues or out-of-date Office applications.

Free Microsoft Office alternative

Try WPS Office for Seamless File Sharing and Collaboration

If Microsoft Excel's sharing features are blocked by script errors or service outages, WPS Office provides a lightweight, highly compatible alternative. You can easily share files, collaborate in real-time, and work without encountering Microsoft-specific SharePoint script errors.

1. Open your file in WPS Spreadsheet: Launch WPS Office and open your .xlsx file.
2. Click the Share button: Click the Share icon located in the top right corner of the application window.
3. Invite collaborators: Generate a secure sharing link or enter email addresses to invite others to edit or view the document.

Free and lightweight alternative to Microsoft Office.Highly compatible with Microsoft Excel formats (.xlsx, .xls).Built-in cloud sharing and real-time collaboration features.No complex SharePoint dependencies or web-component script errors.

Frequently Asked Questions

Why does Excel show a SharePoint core.js script error when sharing?

This error occurs when Excel fails to load the web-based Share dialog components correctly. It is often caused by network security settings blocking the script, outdated Office versions, or a temporary Microsoft 365 service degradation.

Can I share the Excel file without using the Share dialog?

Yes, you can bypass the in-app Share dialog by saving the file directly to OneDrive or SharePoint, opening your web browser, navigating to the file location, and sharing it directly from the web interface.

Will this script error affect recipients' ability to edit the file?

In some cases, yes. If the file permissions were not successfully communicated to the server before the script error occurred, recipients might be restricted to 'Read-only' access until the sharing settings are properly applied.

Document & File Issues