Error I can't seem to fix

Hi everyone. I am trying to build an app that's capable of displaying a RTSP stream of my IP camera. I am building it with GStreamer and using a C Bridge Header so it's Swift compatible. I keep getting this error, and I can't figure out how to solve it. I've tried everything I can think of, and everything ChatGPT can think of (lol). Anyone any idea's? Sorry if this post falls in the wrong category. I didn't see any categories that my problem fits in, so I chose this one.

You haven't posted enough context. If you click on the Report navigator icon (the rightmost icon at the top of the left column in Xcode, which looks like a hierarchical list), you can see the full build log, which should help you to fix errors like these.

With what you've posted, we can't see the name of the first missing file. The second missing file may be missing because the first is missing, and that in turn may be due to something reported only as a warning in the detailed build log.

Error I can't seem to fix
 
 
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