That shows it is a problem with your theme. You need to contact the theme developer/ vendor as we do not support themes that are not from WordPress repository. Alternatively you may use a theme from here: http://wordpress.org/extend/themes/
But the thing is that I have built another child theme on the Adapt Theme – and that site doesn’t have the same issue. So it must have something to do with my child theme… But I can’t find the problem.