Thanks James.
No, resetting plugins and themes made no difference.
I’ve managed to upload the theme that I want in zip format and that seems to be working so I will try to ignore the undefined index problem and see how it goes.
Thanks very much James
I have tried what you suggested (with the upgrade – 4.8.2) with no improvement, I’m afraid.
The main thing that’s bugging me and I guess is related to the undefined index problem is that if I go to themes and then click on ‘Add new theme’ then I get the following (very unhelpful error)…
An unexpected error occurred. Something may be wrong with ww.wp.xz.cn or this server’s configuration.
Hi Serges
Cheers for pointing it out. You’re not wrong about it not being very solving though!
