Oh, also, I had the problem when the developer was working on my site. But I told him and he was able to create a user from his user account, and after that I was also able to create one from my account. But I haven’t been able to add a user since.
Thanks very much Lisa!
I used a health check plugin and found that it was the WidgetKit plugin update that caused the problem, so I’ve downgraded to an older version.
Thanks guys – will get to work on your recommendations.
Regarding editing the source code – is it possible at all to access the source code, as it is presented in “view source code” (right-click) and in V3C’s HTML checker, to make the changes directly to the sections where V3C’s checker spots errors?
Thanks again.