Michael,
Thanks... I have already tried this step but once more I followed your instructions, renamed the 2016 theme folder and activated the 2015 theme.
The problem remains.
I have as you suggested updated my core files, several times now.
With the 2016 theme being the default theme I imagine that it is compatible.
I have an earlier backup which I can upload... when I do so the problem is solved momentarily.... until I update any of the themes or
update to the latest version of wp.
I believe it is a problem with the database as I can use the actual installation I have and point it to another database... this does not give me problems.
