Can’t import files into Rush

I have a Gen4 iPad Pro with the mk2 chip and am trying to use Premiere Rush to do first drafts of videos while away from my main computer. However, no matter what I do I keep getting a media import error - unsupported media type message every time I try to create a project. I shoot with a Sony a7iv and dji drones. I have tried importing log files and normal files but get the same message. I want to use Rush so I can then continue editing in Premiere Pro but if there is no easy fix I may have to switch to DaVinci resolve (not my preferred option).