Impossible to open http://mods.tikiwiki.org/Dist/themes-tikipedia-SVN 15406 - for TikiWiki2.tgz : n/a
Before the error I see:
Apache has the right to write in your file tree, which enables the installation, removal or upgrade of packages. When you are done with those operations, think to fix those permissions back to a safe state (by using "./fixperms fix" for example). downloading 'http://mods.tikiwiki.org/Dist/themes-tikipedia-SVN 15406 - for TikiWiki2.tgz'...
I am running 2.3, and have reproduced the problem at two independent sites.