I can't use the imported audio in unity

When I import audio it gives the following error: Errors during import of AudioClip Assets/SomeSound.mp3: FSBTool ERROR: The format of the source file is invalid, see output for details. FSBTool ERROR: Internal error from FMOD sub-system.

and I am unable to add it to the audio source as it doesn't recognize it as an audio file........ all the files are mp3 and all are less than 4 mb in size and I'm using unity 2021.1 Pls help