This issue was resolved via email. For others, here are the 3 things that went wrong:
1. All tiles in the layouts should have width > 0 and height > 0. One of your tiles had a height of 0, which confuses the exporter.
2. All layouts should have the same dimensions (either 4:3 or 16:9)
3. All scene transitions must be in order. In your case, one transition was at 02:25.000, and the next transition was at 02:24.603