DaVinci decided I wasn’t allowed to import media all of a sudden.

I’m creating a compilation video and not even 5 minutes after I imported one video, it wouldn’t let me import any others, not even the one I had JUST imported. They are all .mp4s and as far as I know I didn’t misclick anything, it just will not let me import anything now. I restarted my PC, restarted windows explorer, everything. What is wrong with this? I need this fixed as soon as possible.