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RaoulRSV's avatar
RaoulRSV
Copper Contributor
Dec 21, 2022

Error loading add-in ... while manifest is ok

I developped an Excel web addin with an aspnet core 6.0 API and published it on a dedicated server on Azure. Excel raise an "Error loading add-in" error when the complement is installed on Excel. P...
azure functions
web apps
Senthil's avatar
Senthil
Copper Contributor
Mar 18, 2024

RaoulRSV  

Here are some simple troubleshooting steps for the "Error loading add-in" issue:

  1. Check Manifest URL: Make sure the URL in your manifest file is correct and can be accessed from Excel.

  2. Network Settings: Ensure your server allows traffic from Excel and that there are no firewall issues.

  3. SSL/TLS: If you're using HTTPS, make sure it's set up correctly with a valid certificate.

  4. Server Logs: Look for any errors or warnings on your server that might explain the issue.

  5. Excel Logging: Enable logging in Excel to get more details about the problem.

  6. Excel Version: Make sure your Excel version is compatible with your add-in.

  7. Test on Another Machine: Try your add-in on a different computer to see if the problem persists.

  8. Revalidate Manifest: Double-check your manifest file for any mistakes.