There's a field in the project structure that didn't get set properly (called audio_file_arr). Try saving the project before exporting. If that still doesn't work: save, exit, relauch, and load then export.

You may also want to upgrade to AEO-Light 2: it's been rewritten in C++ and OpenGL and runs quite a bit faster: https://usc-imi.github.io/aeo-light/