Looks like this is related to
https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/2089071
There's a workaround posted there:
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Andreas Perhab (ap-wtioit) wrote 7 hours ago (last edit 7 hours ago):
#4
Workaround in https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/2089136
(working tarfile.py: https://launchpadlibrarian.net/759546541/tarfile.py)
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https://bugs.launchpad.net/bugs/2089176
Title:
Python tarfile module invalid header
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