Ich habe es einfach über einen CSS Code gelöst, ohne groß irgendwelche Systemdateien zu editieren, die bei einem Update überschrieben werden…
Der Text verschwindet dann im Design…
Hello @aachener and welcome to the communityforums of NC.
As you have posted your answer in german only and as this is generally an international forum (standard: english) I moved your topic over to german subcategory.
Apart from your tinkering around there would be a common way of adjusting that text…
under https://your.url.here/settings/admin/theming
the loginscreen will show every name that you would give your server (earlier you needed theming-app - it could happen that you don’t need to install that extra since it could be a part of the core in the meanwhile)
I simply solved it using CSS code without having to edit any system files that would be overwritten during an update…
The text then disappears into the design…