.mp4 and .mov videos importing as audio only

[terrib6280]

I just now started having a problem importing videos using Premiere elements 2018 version 16. I've tried importing .mp4 and .mov videos but they import as audio files. I previously imported similar videos from the same source location without any problems. Can someone provide some suggestions to try? I haven't used Photoshop long so I appreciate as many details as possible. This is my first try at using the forum. Thank you!

[Ann Bens]

Install or reinstall latest version of Quicktime.