Upgrade 14.04 to 16.04

I'm on a totally fresh 14.04, installed today and I've done update and upgrade

I do:

sudo do-release-upgrade -d

..and I get:

Leser mellomlager

Det oppstod en kritisk feil

Error in sys.excepthook:
Traceback (most recent call last):
File "/tmp/ubuntu-release-upgrader-0040tc/DistUpgrade/DistUpgradeViewText.py", line 145, in _handleException
"n".join(lines))
File "/tmp/ubuntu-release-upgrader-0040tc/DistUpgrade/DistUpgradeViewText.py", line 180, in error
print(twrap(msg))
UnicodeEncodeError: 'ascii' codec can't encode character 'xab' in position 170: ordinal not in range(128)

Original exception was:
Traceback (most recent call last):
File "/tmp/ubuntu-release-upgrader-0040tc/xenial", line 8, in <module>
sys.exit(main())
File "/tmp/ubuntu-release-upgrader-0040tc/DistUpgrade/DistUpgradeMain.py", line 242, in main
if app.run():
File "/tmp/ubuntu-release-upgrader-0040tc/DistUpgrade/DistUpgradeController.py", line 1876, in run
retu self.fullUpgrade()
File "/tmp/ubuntu-release-upgrader-0040tc/DistUpgrade/DistUpgradeController.py", line 1691, in fullUpgrade
self._view.updateStatus(_("Checking package manager"))
File "/tmp/ubuntu-release-upgrader-0040tc/DistUpgrade/DistUpgradeViewText.py", line 159, in updateStatus
print(msg)
UnicodeEncodeError: 'ascii' codec can't encode character 'xe5' in position 14: ordinal not in range(128)
=== Command terminated with exit status 1 (Thu Jun 23 20:29:20 2016) ===