Try this:
1. Save a pla of the file to your desktop.
2. Unplug your network cable.
3. Open the file.
4. If it opens save it as a pln file on your desktop.
5. Plug in your network cable.
6. Reconnect to the network.
7. Share the file.
If this works the problem might be related to something with your file trying to connect in a odd manor to the server and it is timing out, though you can't see this activity for some reason.
You can also clear your Archicad Preference files as well.
http://www.archicadwiki.com/PreferencesCleaning
Archicad 25 (5005), Windows 11, AMD RYZEN 7 3900 (64 GB RAM)