title: Shopware Basic settings are not displayed ("Basic settings are loading")
body: <p>I installed the Shopware 5.4.6 community shop. 
  I now wanted to make changes in the basic settings what is answered with "Basic settings will be loaded" (BTW i use german version so i got "Grundeinstellungen wird geladen").
  All other points can be displayed without problems.</p>
  
  <p>PHP Version 7.0.31, Linux 3.16.0-6-amd64, Apache, Shopware 5.4.6</p>
  
  <p>backend UI shows no errors in Shopware logs </p>
  
  <p>backend UI shows shows nothing in the system log.</p>