It seems that there is still an error in relation with backtofront plugin.
If I don't have any relation inside a form it works - but when I put a relation inside then I get the error above - after many times of switching on and off the modified files I can see the form on frontpage.
But if I click on new or update I get the following error:
An exception has been thrown during the rendering of a template ("Das Partial '_button_0.htm' wurde nicht gefunden.").
There is now also an additional in the backend:
If I want to open /backend/rainlab/user/users I got the following error:
Call to undefined method Backend\Widgets\Filter::getScopeDepends()
If I open /backend/system/eventlogs I got the following error:
Undefined property: Backend\Classes\FilterScope::$ignoreTimezone
Currently I'm using Build 471