error 702 with voice converter

I used the sw audacity with a tonor t30 usb microphone trained davinci resolve studio 20 beta 3 the procedure lasted about 15 minutes effective once saved with my name I imported another audio into the timeline and with the voice converter I wanted to give it my voice after a few moments the error 702
appeared as per the attached video

let me know thanks
marco

appeared as per the attached video

let me know thanks
marco