Comment 11 for bug 1391195

@fisharebest @#10:
Not helpful, because the forum is not indexed. So for everyone coming here using google, here's the solution:

> If you replace the file library/pclzip.lib.php with the latest version (github.com/fisharebest/webtrees/blob/mas...brary/pclzip.lib.php and click "raw"), then the upgrade wizard should work

Source:
http://www.webtrees.net/index.php/en/forum/help-for-ver-1-6-1/29857-probleme-mise-a-jour-1-6-1#50269

Ben