Hi @Andres_Garcia1,
Thanks for writing in to ask us about this issue. I think the best way to start diagnosing this is to take a look at your logs. Can you please use the directions found here and send over a set of logs to our File Uploader?
After sending over the logs since this is is login issue can you please take a look at your web browser and make sure you don’t have any content blockers active there. Those can interrupt the login process.
If you don’t it means that the Roon server itself is not running even though the client is. If you do see it click on it and see what the status of Roon server is.