Cannot detect wav files for conversion to mel spectrogram

[JET2001]

Hi! I am getting this error where the create_mel() function is unable to detect the .wav file for some reason.

This is despite being able to extract the .wav files from zip.

In addition, here are my audacity settings for conversion of the audio files: 22050 Hz video rate and mono setting

Do you happen to know what might be the problem?