Can't drag N drop audio onto Scaler 2 in Cubase Pro 10.0

I have Cubase Pro v10.0.40 on a 64 bit Win 10 system and am trying to drag n drop an audio track’s audio onto Scaler 2. The mouse cursor turns to the “NOT Allowed” symbol and I get no detection. The only tutorial I have found shows a similar method in Logic. Is this not supported in Cubase?

I found no other way other than drag N drop to get audio into Scaler 2 for audio detection. Shouldn’t Scaler 2 allow the opening of a supported audio format from the file system?

Please tell me what I am doing wrong…