No sound on exported audio file

Hello, I am working on a Garageband project and I'm trying to export the audio to my desktop. When I play the file, the audio cuts off around the 45 second mark. On garageband nothing weird happens at the 45 second mark, so I'm confused. Wav, aiff, and aac files all have this problem.

I've tried isolating single tracks and then exporting to see if any single track was causing a problem. But the problem still persists even on isolated tracks.

Verrrry occasionally the audio will cut out on garageband itself at the 45 second mark, but it seems random when it does that and I don't know how to recreate it.

I worked on this project yesterday and had no issues exporting the file. Does anyone have any advice to fix this? Thank you