Mar 18 2019
Problem solved. I changed the permissions for /images to 755
Sorry for disturbing.
Jan 11 2016
Thanks for your assistance, Florian and André.
Jan 8 2016
Jan 7 2016
It has been brought up 10 days ago in https://www.mediawiki.org/wiki/Extension_talk:ContactPage
My wiki has been upgraded regularly. I started using Composer (on my Windows laptop) about a month ago (and ran into several problems since then). And the problem occurs with the package taken from the Git Rel1-26.
Dec 25 2015
Dec 13 2015
I seem to have a similar problem to the one described here.