Resolve 20 upgrade, rendered video not working in obs

I can link any other video in obs except the ones I just created on resolve 20. Am I missing something? I rendered video as mp 4 like always

Care to give more informations?

Render settings, codec type, resolution, operating system, the problem you're facing, the output of OBS while receiving the error ... Dude, you have to learn to post problems.
You know, "MP4" is just a container, it doesn't tell anything.