Hello servinfor.fenix,
Thank you for reporting this issue, and I'm sorry for the inconvenience you're experiencing with the Media Manager.
To help me investigate the "Folder Path Not Found" error, would you be willing to grant me temporary administrative access to your site? This will allow me to examine the configuration directly.
Before you provide credentials, I highly recommend creating a complete backup of your site to ensure the safety of your data.
Looking forward to your response.
Best regards