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Your IT department is almost certainly correct! Basic rule with Audition, and we've said it many times before - never work with remote files. It can cause all sorts of difficulties, simply because of missing access rights to the drive, or also because the thing actually connecting you to the drive is the electrical equivalent of a bit of wet string.

The problem is that when a file is opened or saved, it's recieved or sent as a stream of data, and this needs to be relatively  constant. Now, if you open or save files on a local machine, the transfer is completely different, and much more robust.  That's because it's essentially a two-way process where each end acknowledges receipt of a block and then sends the next one. This can stand the occasional slowdown in a way that dealing with an audio transfer from or to a remote drive couldn't ever manage.

What we mean by 'local' in this context is a drive directly connected to your machine - so it could be an external USB drive so it doesn't have to be completely internal. The only warning if you use a USB drive is that it should ideally be connected direct to the machine, and not via a hub, as these have also been 'difficult'...

I am on a PC as well working on a shared network Drive. My IT department thought working on the network drive might be the issue so is suggesting I transfer my files to a local drive. anyone else had this experience? the error message doesn't always cause a crash (sometimes I can just click ok and keep going) but it is clearly unstable. and sometimes it does cause a crash.

The only references I can find to this relate to running Adobe Bridge, and it's complicated. Does this cause an actual crash?

Im on PC and it also happens to me when i try to export my multitrack session

Is this on a PC or a Mac?