I'm getting this error message when trying to send a photo to a new contact. I can send and receive texts from them and they can send photos to me, but I get this error message whenever I try to send a photo. I've tried restarting my phone and sending photos to other contacts works fine. I've also tried over both wifi and mobile data. I'm on the Nexus 6P running Oreo. Next I can try another app but figured someone else may also have this problem.