I don't have much experience about this wallet but let me try to find some solution and maybe it can fix your issue.

I found this thread from ubuntu forum "Armory keeps crashing" the issue fix after he uninstalled and build it again from scratch.

Check this page https://www.bitcoinarmory.com/building-from-source/ and follow the guide under this "Ubuntu Build Instructions" and try again.

Note: Don't do this if you don't have a backup wallet.