Funny thing is: it worked when on default settings, with the [LOGIN_FORM] in the text area to be displayed when opening a locked page. I removed it as I don't want no login form here, I want a redirect to another form that allows to contact our service team. This is no longer working, all I get is a 404, even if I select "redirect to home".
Another things is: the display content text areas don't allow the usage of html or shortcodes (besides the [LOGIN_FORM]). I can't use shortcodes from other plugins here (like FS Contact Form).
The basics of this plugin are working fine, but I don't want visitors run into 404 error pages - showing them a few lines of text isn't enough either - I have to redirect them to a form or page that helps them how to gain the missing access rights (an application form).