Comment 2 for bug 1991407

The error in the logs is:

Sep 30 15:52:22 ubuntu install.py: Exception during installation:
Sep 30 15:52:22 ubuntu install.py: Traceback (most recent call last):
Sep 30 15:52:22 ubuntu install.py: File "/usr/share/ubiquity/install.py", line 771, in <module>
Sep 30 15:52:22 ubuntu install.py: install.run()
Sep 30 15:52:22 ubuntu install.py: File "/usr/share/ubiquity/install.py", line 134, in run
Sep 30 15:52:22 ubuntu install.py: self.copy_all()
Sep 30 15:52:22 ubuntu install.py: File "/usr/share/ubiquity/install.py", line 529, in copy_all
Sep 30 15:52:22 ubuntu install.py: self.db.progress(
Sep 30 15:52:22 ubuntu install.py: File "/usr/lib/python3/dist-packages/debconf.py", line 83, in <lambda>
Sep 30 15:52:22 ubuntu install.py: lambda *args, **kw: self.command(command, *args, **kw))
Sep 30 15:52:22 ubuntu install.py: File "/usr/lib/python3/dist-packages/debconf.py", line 104, in command
Sep 30 15:52:22 ubuntu install.py: status = int(status)
Sep 30 15:52:22 ubuntu install.py: ValueError: invalid literal for int() with base 10: ''
Sep 30 15:52:22 ubuntu install.py:

I'm unsure whether this is sufficient information to diagnose the bug.