Fatal error: Uncaught TypeError: DBWorkDozenten::getDozenten4KursWB(): Argument #1 ($pKnr) must be of type string, null given, called in /home/www/classes/export/ExportCalculation.php on line 2181 and defined in /home/www/classes/db/DBWorkDozenten.php:1301 Stack trace: #0 /home/www/classes/export/ExportCalculation.php(2181): DBWorkDozenten->getDozenten4KursWB(NULL) #1 /home/www/classes/export/ExportKursuebersicht.php(41): ExportCalculation->getVarValue4Kurs('doz_1_vorname', Object(Kurs)) #2 /home/www/classes/exportadapter/Exportadapter.php(378): ExportKursuebersicht->getVarValue('k_doz_1_vorname') #3 /home/www/classes/exportadapter/ExportadapterVariableProviderAdapter.php(42): Exportadapter->getVarValue('k_doz_1_vorname') #4 /home/www/classes/scripting3/VariableProviderToParserExportadapter.php(27): Kufer\Web\Classes\Exportadapter\ExportadapterVariableProviderAdapter->getVarValue('k_doz_1_vorname', NULL) #5 /home/www/log/cache/80220-4.20.79.02/code/kuferweb/543-780f4fb6a95d63d56910d00afd2f8a6f-header-UTF-8.php(2): Kufer\Web\Classes\Scripting3\VariableProviderToParserExportadapter->getVarValue('k_doz_1_vorname', NULL, Array) #6 /home/www/log/cache/80220-4.20.79.02/code/kuferweb/543-780f4fb6a95d63d56910d00afd2f8a6f-header-UTF-8.php(2): class@anonymous->__construct(Object(Kufer\Web\Classes\Scripting3\VariableProviderToParserExportadapter), NULL) #7 /home/www/classes/scripting3/ScriptingEngineHTMLScript3.php(49): Kufer\Web\Classes\Scripting3\CacheManager::{closure}(NULL, Object(Kufer\Web\Classes\Scripting3\VariableProviderToParserExportadapter)) #8 /home/www/classes/exportadapter/Exportadapter.php(452): Kufer\Web\Classes\Scripting3\ScriptingEngineHTMLScript3->interpret(Object(Kufer\Web\Classes\Exportadapter\ExportadapterVariableProviderAdapter), Object(Closure), '543-780f4fb6a95...') #9 /home/www/classes/datamenu/DataMenuBasis.php(289): Exportadapter->replaceVarNames() #10 /home/www/classes/datamenu/DataMenuBasis.php(150): DataMenuBasis->renderSightPart('header', Object(ExpKurse), Array, Array, true, false) #11 /home/www/classes/datamenu/DataMenuBasis.php(145): DataMenuBasis->parseHeader(Array) #12 /home/www/webbasys/include/pdf/KwPdfTermine.php(53): DataMenuBasis->getheader() #13 /home/www/webbasys/include/pdf/KuferWebHtml2Pdf.php(45): Kufer\Webbasys\Includee\Pdf\KwPdfTermine->getContent() #14 /home/www/webbasys/pdf.php(27): Kufer\Webbasys\Includee\Pdf\KuferWebHtml2Pdf->generatePdf() #15 {main} thrown in /home/www/classes/db/DBWorkDozenten.php on line 1301