Lokal_Profil added a comment.
An update on this. In Amsterdam we found at that it seems as though my installation (ubuntu or python) made the cert file not readable by the process running pywikibot. Strange and weird but unlikely to be related to pywikibot itself.
TASK DETAIL https://phabricator.wikimedia.org/T73497
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To: Lokal_Profil Cc: pywikipedia-bugs, valhallasw, Lokal_Profil, XZise, Mpaa, jayvdb