the red media capture button is not enabled

Hello everyone,
the red media capture button is not enabled. I just can’t click to capture by media capture. In unreal 5.
I have settings for my BlackMagic card but the button to go to capture doesn´t enabled. . In other projects in the same PC it work fine, in this projec i configured the media input and output. Someone cand help me?

This error may be because an empty array element is created and not routed within the media capture window. Delete all elements within each of the three fields, render target, viewport, and current viewport. Then create and route the one/ ones you need.

Anyone figured this out? Cant get one feed out.