<br />
<b>Fatal error</b>:  Uncaught TypeError: Return value of Edrone::printEventData() must be of the type string, null returned in /var/www/clients/client1/web1/web/modules/edrone/class/class.Edrone.php:120
Stack trace:
#0 /var/www/clients/client1/web1/web/modules/edrone/class/class.Edrone.php(115): Edrone-&gt;printEventData()
#1 /var/www/clients/client1/web1/web/modules/edrone/hooks/system.php(8): Edrone-&gt;printEdrone()
#2 /var/www/clients/client1/web1/web/class/class.Event.php(300): Core::{closure}(NULL)
#3 /var/www/clients/client1/web1/web/class/class.Core.php(305): Event::run('system.display', '&lt;!DOCTYPE html&gt;...')
#4 /var/www/clients/client1/web1/web/index.php(821): Core::reader('&lt;!DOCTYPE html&gt;...')
#5 {main}
  thrown in <b>/var/www/clients/client1/web1/web/modules/edrone/class/class.Edrone.php</b> on line <b>120</b><br />