Hi @DataUnicorn,

Thank you @AntoineWm, for your insights.

Delete the faulty Lakehouse connection from Settings Manage connections and gateways. Create a new Lakehouse connection using the Copy Data activity and sign in with your Microsoft account. Once you see the green check mark, set the destination path to Files/new_data/sales.csv and confirm you have Member or Admin permissions in the workspace. After authentication is restored, you’ll be able to browse folders normally and select the new_data folder in the pipeline without errors.

Thank you.