I downloaded a different LaunchBox theme (Default K) and that resolved the issue. Quite strange, but at least it helped. Now I just need to fix my other problem and I’ll be completely happy.
https://forums.launchbox-app.com/topic/90095-crashing-navigating-files
What’s really driving me crazy is that every media file and game I add outside of LaunchBox has to be manually added. That means renaming every cover, banner, etc. to match the game and placing it in the correct folder. I thought the whole point of LaunchBox was to make things easier, not harder.
BlackPredator72's post in LB Crash while adding images was marked as the answer