Problem with the new version Volumio

Hi, after automatically upgrading to the latest version of Volumio 3.584, when trying to play anything I get the error “Failed to open “alsa” (alsa); Failed to open ALSA device “volumio”: Invalid argument”. Can this be fixed so as not to do a downgrade?

You upgraded to a test version. Even though there were clear instructions not to do this.

Please download the latest stable version (VERSION: 3.569) and reflash your SD.
Disable Test mode:

Thank you, the update did itself. Is it possible to install an older version without losing the settings?

Unfortunate not.
Make sure to disable the test mode. This should only be enabled if you don’t mind things get broken or on Volumio’s request.