Export Failed In Resolve Studio: Hunting The Clip That Breaks It

so annoyed rn ive been battling this all evening. Resolve Studio wont render my project to DNxHR 😭 It fails at the first second with this:

Render Queue
Job 1  -  Trailer_v3   H.264  |  3840x2160  |  23.976 fps   Completed
Job 2  -  Wedding_Final   H.265  |  3840x2160  |  25 fps  |  stopped at 01:12:44:08   Failed
Job 3  -  Wedding_Social_9x16   H.264  |  1080x1920  |  25 fps   Waiting

i restarted teh PC and teh app. are there any known causes i should check first?

Im under real time pressure, sooo a quick reliable workaround would be amazing. A proper explanation for next time would be great too. Any pointer in the right direction would save my week.