Since updating, it is no longer possible to comment on posts in the newsfeed (there's a comment icon but nothing happens when it's clicked). I deactivated all plugins and removed all custom HTML blocks containing ads etc but commenting still doesn't work. I have even tried changing the theme but to no avail.
In addition, entries in the custom CSS on the edit theme page in the Admin panel make no difference at all - they are saved but nothing happens to change the layout.
Any help would greatly appreciated (and I apologise if I started a new topic but I couldn't find one that covered these issues!).
Many thanks.