How to Fix Excel ChatGPT Add-In Catalog Connection Error
Question details
Users are unable to install the ChatGPT for Excel add-in and encounter an error preventing them from connecting to the Microsoft catalog.

- Product
- Microsoft Excel
- Device & OS
- not provided
- Scenario
- Installing and trusting the ChatGPT add-in from the Office Store or Microsoft AppSource.
- Observed behavior
- When clicking the 'Trust this add-in' button, Excel returns the error message: 'We cannot load this add-in because we could not connect to the catalog.'
Before attempting any fixes, ensure your device has a stable internet connection and temporarily pause any strict third-party antivirus software or VPNs that might be blocking Microsoft's network traffic.
Verify Microsoft Account and Add-in Permissions
Ensure you are logged into Excel with the correct Microsoft account and have the necessary administrative permissions to access the AppSource catalog.
Catalog connection errors often occur when the Microsoft account currently signed into Excel does not match the account that holds the Office license, or when the account lacks permission to download third-party add-ins.
Open Microsoft Excel, navigate to 'File' and click on 'Account'. Verify that you are signed in with the Microsoft account associated with your Office license.
Instead of using external web links, go to the 'Insert' tab on the Excel ribbon and click on 'Get Add-ins'.
In the Office Add-ins window, select 'Store', type 'ChatGPT' into the search bar, and attempt to add it directly from the interface.

Disable Proxy and Network Restrictions
Network security configurations, such as proxy servers, can block Excel from communicating with the Microsoft Add-ins catalog.
Clear the Microsoft Office Add-in Cache
Clearing corrupted temporary files can resolve connection glitches between Excel and the Microsoft Add-in catalog.
Experience Seamless AI Integration with WPS Office
Tired of troubleshooting Microsoft Excel catalog errors and configuring external add-ins? Switch to WPS Office, a free and lightweight alternative that features seamless format compatibility, a familiar UI, and powerful built-in AI tools.
- 1. Download WPS Office: Visit the official WPS website to download the free installation package.
- 2. Install and Open: Follow the on-screen prompts to install the lightweight suite, then open your existing Excel spreadsheets.
- 3. Explore Built-in AI: Access WPS AI directly from the toolbar to analyze data, generate formulas, and summarize insights instantly.

Frequently Asked Questions
Why do I get a catalog connection error when trusting the ChatGPT add-in?
This error typically occurs when Excel is unable to communicate with the Microsoft AppSource store. Common culprits include proxy or VPN interference, strict firewall rules, lack of administrative permissions, or logging into Excel with an account that doesn't match the Office license.
Does the ChatGPT add-in work on older versions of Excel?
The ChatGPT add-in officially requires Excel 2016 or later. However, some older perpetual licenses (like Office 2016 or 2019) may have outdated security protocols or limited AppSource support, which can cause connection failures. Updating your Office application to the latest build can help.
How can I fix add-in catalog errors on a company computer?
If you are on a managed company or school device, your organization's IT department likely restricts Office Store access for security reasons. You will need to contact your Microsoft 365 administrator and request that they whitelist the add-in or deploy it centrally via the Microsoft 365 Admin Center.




