IEMOCAP incorrect file format after processing

Hi, has anyone come across this error when running the run_preproccessing script? 

ValueError: File format b'\x00\x05\x16\x07' not understood. Only 'RIFF' and 'RIFX' supported. Filename: processed_data\audio\._Ses01F_impro01_F000.wav

IEMOCAP dataset playing fine on my laptop, however, the processed files are corrupt. 