Forum Discussion

cmflynn's avatar
cmflynn
Occasional Reader
May 29, 2026

Add-in Error: We could't connect to the '{0}' catalog server for this add in

For the past month every time I try to use an Add-In in word I get the following error "we couldn't connect to the '{0}' catalog server for this add in." I have tried from multiple computers, Safari, Chrome, different accounts, etc. and nothing is working. It is a personal account and I use word online. It happens for multiple add-ins and I have reached out to the companies directly and they said it was a Microsoft issue.

1 Reply

  • Charles_Kenyon's avatar
    Charles_Kenyon
    Bronze Contributor

    Hi,

    I have more than thirty Add-Ins loaded.

    This does not happen with any of the Add-Ins I've created. Here they are: Add-Ins

    It does not happen with any of the Add-Ins I have that were written by Word MVPs.

    It does not happen with any of the Add-Ins I've received through the Microsoft Store.

    The problem is a product of how the Add-In is interacting with Word. It is an issue of the authors of the Add-In not being able to make it work with Word. 

    It may be something that Microsoft changed. They usually notify developers of changes, I believe. However, it is an issue for the author of the Add-In to fix.

    Would you care to specify the Add-Ins by name?

    Were they obtained through the Microsoft Store?

    =================================

    I am a fellow user with more than thirty years experience using Word. I do not work for Microsoft. I do not speak for Microsoft.