iMovie "does not see" videos from my Canon Vixia HF M32 and shuts down. Any ideas?

Lately, I have not been able to download videos as I used to from my Canon Vixia HF M32. My iMovie would not see the camera and would often close unexpectedly. It then gives an incomprehensible error message. I have no idea why this is happening or what to do. I was able to dowload some videos using a pc and a different software. Any clue?

Thanks