I had it already with the older version ( believe it was 4.2.0), that the login fields for the admin are vanished. In the html there is only ( in the content auf main)
You must be logged in to access the administration area; please enter your credentials below.
When I updated to 4.3.0, when it happened first it worked for some weeks.
Does Somebody had the same problem, or better, know a solution ?