Warped/pixelated clips

I'm working off of DaVinci Resolve 15, and when I try to import my clips, they're all warped and pixelated. When I first opened the project, it gave me a notification about my clips and timeline having some sort of mismatch, so I think the warping could be traced to that potentially? I've tried tinkering around in Project settings, but nothing seems to fix it. The clips are playing fine offline, so I know it's something to do with Da Vinci.

Would anyone be able to help?

What was the error message that Resolve displayed?
Give us details of your computer system and also the source, codec, and resolution of the clips.