Errors while running the code.!!

[Raj-CS5012]

Error One:

AssertionError Traceback (most recent call last)
Input In [1], in <cell line: 121>()
125 warnings.filterwarnings("ignore")
127 speakerDiarisation = SpeakerDiarisation(file_name)
--> 129 audio_format = speakerDiarisation.identifyFormat()
130 #print(audio_format)
132 response = speakerDiarisation.request(audio_format)

Input In [1], in SpeakerDiarisation.identifyFormat(self)
26 elif not file_extension:
27 error = file_name + file_extension + ' is either a directory or not a valid file'
---> 28 raise AssertionError(error)
29 else:
30 error = 'File extension ' + file_extension + ' not valid'

AssertionError: -f is either a directory or not a valid file

Error Two
import librosa
ModuleNotFoundError: No module named 'librosa'

I appreciate if someone can help me in fixing the issues..!!
Thank you well in advance.