The track is displayed but cannot be downloaded/played

i have some problems with dj engine software and hardware, it turns out that in my software many tracks appear in gray color and tells me “streaming track are only playable on engine dj hardware” and in my denon or in a neumark pro go if the track appears it doesn’t let me download it. it is as if there was a corrupted database. can you help me?

I already hit clear, everything is analyzed from the beginning.

track cannot be downloaded to hardware.

Spanish.

tengo algunos problemas con dj engine software y hardware, resulta que en mi software me aparece muchos tracks en color gris y me dice “streaming track are only playable on engine dj hardware” y en mi denon o en una neumark pro go si aparece el track no deja descargarlo. es como si hubiera una base de datos corrupta. me pueden ayudar?

Ya le di a aclarar, todo esta analizado desde el principio.

La pista no se puede descargar en la controladora.

failed to get dropbox download link engine dj