Madmunch

Hopefully resolved.

I found a tread where someone suggested to replace the fonctions.php in the childtheme with a fresh copy. For some reason, it seems to work.

I had the same problem as Jeremy described, same warning, and I did replace the fonctions.php in my childtheme, as he suggested. I seems to work for me too.. Ye!
Thank you for sharing your solution.

Thanks CyberCobre,
I could enter my site. It “works” (I mean the infos are there and the links fonction) with the original theme, but of course it’s disgustingly ugly and messy. So then I renamed my theme with the previous “twentytwelve2-child” name. I guess the whole point was simply to access my WP, right?
So I do have WP 4.4.1 installed.
I have a dozen pluggins installed: I tried to uninstall each of them,one at the time, but the warning message still appears.
I also updated theme twentytwelve.
Any suggestion?