Audacity ceases to respond when opening a .OGG file


I am using Audacity to test a .OGG file that I have converted from .M4A because I am adding sound files to a game that I am creating a sounds pack for, and the game requires .OGG files for this. I want to open the file and make sure it actually works. When trying to open the file (dragging into Audacity, selecting [open with>Audacity], etc) Audacity immediately stops responding and will sit doing nothing, forever. Any ideas on why this might be happening, or what I can do to fix it? It works fine otherwise until I try to open the file.

I am on MacOS Mojave 10.14.5 (18F132),
running Audacity 2.3.2 (which I have just recently downloaded)

Help will be greatly appreciated.
Thank you

How did you create the OGG file? Do other OGG files open OK?
– Bill