Comment 18 for bug 1820604

I received the error below, on a physical device. The device is an APU2D4 with a 120 GB mSATA SSD and has no video, so I was using the serial port as a putty terminal.

vendor site on the device: https://www.pcengines.ch/apu2d4.htm

I was following this article to use the serial port during install:

http://www.sundby.com/index.php/install-ubuntu-16-04-with-usb-stick-and-serial-console/

I was using the ubuntu-18.04.2-live-server-amd64.iso image loaded on the USB with RUFUS.

An error occurred during installation

┌──────────────────────────── Full installer output ───────────────────────────┐
│Traceback (most recent call last): │
│ File "/snap/subiquity/664/usr/lib/python3.6/runpy.py", line 193, in │
│_run_module_as_main │
│ "__main__", mod_spec) │
│ File "/snap/subiquity/664/usr/lib/python3.6/runpy.py", line 85, in _run_code│
│ exec(code, run_globals) │
│ File "/snap/subiquity/664/lib/python3.6/site-packages/curtin/__main__.py", │
│line 4, in <module> │
│ sys.exit(main()) │
│ File │
│"/snap/subiquity/664/lib/python3.6/site-packages/curtin/commands/main.py", │
│line 177, in main │
│ raise OSError("Unable to find helpers or 'curtin' exe to add to path") │
│OSError: Unable to find helpers or 'curtin' exe to add to path │
│ │
└──────────────────────────────────────────────────────────────────────────────┘
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