[Corrupt Publisher File - "The file appears to be corrupted."]

I have tried updating to Publisher 2.3.0 without it working. I've also located an older version of the file if it's possible to "splice" the old one and the corrupt one into some kind of frankenfile to be able to extract the text?

[Corrupt Publisher File - "The file appears to be corrupted."]

This file got corrupted saving to a network location while someone was working on it overnight. After some googling we've learned that that's a bad idea and we will change procedures going forward.

I've opened the file in a hex editor and I don't see any missing data (I'm not an expert though). Tried creating a new document and using "Add Pages from File" but that doesn't seem to work either.

Is there any way to fix this file, or at the bare minimum be able to read the text that is written inside of it?

The file was saved from Affinity Publisher 2.2.0 on a mac running Ventura 13.6.2 to a network location.

Any help appreciated!

CorruptFile.afpub