Software: Apache/2.4.18 (Ubuntu). PHP/7.0.33-0ubuntu0.16.04.16 

uname -a: Linux digifus 3.13.0-57-generic #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 x86_64 

uid=33(www-data) gid=33(www-data) groups=33(www-data) 

Safe-mode: OFF (not secure)

/var/log/dist-upgrade/20210712-2128/   drwxr-xr-x
Free 9.95 GB of 29.4 GB (33.84%)
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Viewing file:     main.log (1.19 KB)      -rw-r--r--

2021-07-12 21:28:00,101 INFO Using config files '['./DistUpgrade.cfg.trusty']'
2021-07-12 21:28:00,101 INFO uname information: 'Linux digifus 3.13.0-57-generic #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 x86_64'
2021-07-12 21:28:00,723 INFO apt version: '1.0.1ubuntu2.24'
2021-07-12 21:28:00,724 INFO python version: '3.4.3 (default, Nov 12 2018, 22:25:49) 
[GCC 4.8.4]'
2021-07-12 21:28:00,728 INFO release-upgrader version '16.04.32' started
2021-07-12 21:28:00,742 ERROR getting the encoding failed
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-9exv9bot/DistUpgrade/DistUpgradeView.py", line 38, in <module>
    locale.setlocale(locale.LC_ALL, "")
  File "/usr/lib/python3.4/locale.py", line 592, in setlocale
    return _setlocale(category, locale)
locale.Error: unsupported locale setting
2021-07-12 21:28:00,743 INFO locale: 'None' 'None'
2021-07-12 21:28:00,765 DEBUG screen returned: 'No Sockets found in /var/run/screen/S-root.

'
2021-07-12 21:28:00,766 INFO re-exec inside screen: '['screen', '-e', '\\0\\0', '-L', '-c', 'screenrc', '-S', 'ubuntu-release-upgrade-screen-window', '/tmp/ubuntu-release-upgrader-9exv9bot/xenial', '--mode=server', '--frontend=DistUpgradeViewText']'