I'm a beginner Premiere Pro user who commonly adds effects to my projects, so today while trying to assemble a file from multiple clips, I tried to include transitions. When dragging an effect no issues. But after replaying the clip with the added transition, this video goes completely haywire. I've looked at the Adobe support page but couldn't find any fixes. I have tried rendering the file & effects, but this didn't solve the problem.
How do I fix this?
Running OS 10.14.6 on a MacBook Pro
Editing, Effects and Titles, Error or problem, Formats