Hello Fernando Calvo Rebolledo,
Thank you for reaching out to the Microsoft Community. I am here to help and provide assistance with any questions or concerns you may have.
It sounds like you're encountering an issue with the Server Manager when trying to add features to a Windows Server 2016.
Here are a few things you can try to resolve this issue:
- Make sure that the server has a stable network connection, especially if it needs to communicate with a remote server or the internet to retrieve feature lists.
- Sometimes, the Server Manager itself may require updates. Ensure that your server has all the latest Windows updates installed.
- Close and reopen Server Manager to see if the issue persists. Sometimes a simple restart can resolve the problem.
- Run following command to check for and repair any corrupted system files: sfc /scannow dism /online /cleanup-image /restorehealth
I hope the above information is helpful.
If you have any questions or concerns, please don't hesitate to let us know.
Best regards
Phoebe Jin