Fatal error: Uncaught TypeError: Argument 1 passed to DBWorkDozenten::getDozenten4KursWB() must be of the type string, null given, called in /home/www/bw-verdi.de/fileadmin/kuferweb/classes/export/ExportCalculation.php on line 2178 and defined in /home/www/bw-verdi.de/fileadmin/kuferweb/classes/db/DBWorkDozenten.php:1301 Stack trace: #0 /home/www/bw-verdi.de/fileadmin/kuferweb/classes/export/ExportCalculation.php(2178): DBWorkDozenten->getDozenten4KursWB(NULL) #1 /home/www/bw-verdi.de/fileadmin/kuferweb/classes/export/ExportKursuebersicht.php(41): ExportCalculation->getVarValue4Kurs('doz_1_vorname', Object(Kurs)) #2 /home/www/bw-verdi.de/fileadmin/kuferweb/classes/exportadapter/Exportadapter.php(376): ExportKursuebersicht->getVarValue('k_doz_1_vorname') #3 /home/www/bw-verdi.de/fileadmin/kuferweb/classes/exportadapter/ExportadapterVariableProviderAdapter.php(42): Exportadapter->getVarValue('k_doz_1_vorname') #4 /home/www/bw-verdi.de/fileadmin/kuferweb/classes/scripting/ScriptingEngineHTMLScript2.php(149): Kufer\Web\Classe in /home/www/bw-verdi.de/fileadmin/kuferweb/classes/db/DBWorkDozenten.php on line 1301