Lightroom wont let me access some of my photos

Hi there. I am having an issue with my Lightroom and was wondering if someone could help me. My friends and I just went on a trip and to save space we all downloaded photo circle to share pictures with each other of the trip. I went into the photo circle and saved the photos that I wanted and they appear in my photos app as my images and when I go to lightroom and I click on them to edit the message pops up: Photo could not be opened. An error was encountered while trying to open the photo. I dont know why its doing this when I have all the pictures saved to my device and iCloud. It is also doing it only with pictures that I didn't take but saved from the photo circle. Every picture I took I am able to edit. Thanks so much.