IntuneApp.getLobAppContentFile Failed

The error message "The RPC call 'IntuneApp.getLobAppContentFile' returned an error" typically indicates an issue with the upload process of the Win32 app to Microsoft Intune. Here are some steps you can take to troubleshoot this issue:

1. Check the App Package: Ensure that the Win32 app package is correctly formatted and meets the requirements for Intune. You can use the latest version of the Microsoft Win32 Content Prep Tool to package your app.
2. Browser Compatibility: Since you've already tried different browsers, ensure that you are using a supported browser version. Sometimes, browser extensions or settings can interfere with the upload process.
3. Network Issues: Check your network connection and ensure there are no firewall or proxy settings that might be blocking the upload.
4. Intune Service Status: Verify if there are any ongoing issues with the Intune service that might be affecting app uploads. You can check the Microsoft service health dashboard for any reported issues.
5. Retry the Upload: Sometimes, simply retrying the upload after a short period can resolve transient issues.
6. Logs and Diagnostics: If the problem persists, consider collecting logs for further diagnosis. You can view installation issues and logs in the Microsoft Intune admin center, which may provide more insight into the error.

If you've exhausted these options and the issue continues, you may need to reach out to Microsoft Support again with specific details about the steps you've taken and the errors encountered.