Yes, my career. I'd rather not have to go into the finer details if you don't mind, but we are not required to use Microsoft Office in my case (and yes, it's a big company that has been around for years, and yes, they have various operating systems and practices in use). Pages are what they have asked for this particular task as there are certain formatting requirements involved. If I can't get this particular document exported on my end to PDF, that's it. Even if it wasn't urgent, Pages should work no matter what, regardless of the purpose. (I do not mind explaining to you in private, though, but I'm not sure that's possible on here--I'd just rather not share the bigger details in a public forum lest I somehow break confidentiality. But yes, this is exactly what is needed in this point in time, and without a known fix and extremely tight deadlines, this really will be impacting everyone.
By that I mean I'm using Pages on both my iPad and on my mac. They will both open the document, but neither will export to PDF without the app crashing, so I know the issue doesn't resonate solely with something going on in my laptop. Both my iPad and my Mac are updated with the latest operating system available and with the latest version of Pages available, as are the editors' devices (same thing with it crashing). My best guess is that there's something corrupted with the file itself, yet as above, it is able to export to word without problem (but again, the formatting is thrown out for what is needed—I thought converting to word and then trying to export it from that document to PDF would somehow work, but I'm no technician).
No worries, you've already done your best to try and understand the situation. I'm really not sure what else there is to do unless there's another fix (and with my luck, it's probably something very simple yet definitely not obvious).