Your link offered 72 files. However, 35 were missing from what the project expected, leaving large timeline gaps. What there was had no audio processing issue.
But to fully analyze this, please upload the remaining files. They are listed in the attached zipfile.
If you are not using the 64-bit VP version, install it.
40GB of content is a tough haul. Consider breaking the project into segments, exporting each (they will become clips), then merging them for final export.
Missing_files.zip