Fatal error: Uncaught TypeError: array_unique(): Argument #1 ($array) must be of type array, null given in /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/components/commerce_courseproduct/model/commerce_courseproduct/courseproductservice.class.php:368 Stack trace: #0 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/components/commerce_courseproduct/model/commerce_courseproduct/courseproductservice.class.php(368): array_unique() #1 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/components/commerce_courseproduct/model/commerce_courseproduct/courseproductservice.class.php(342): CourseProductService->uniquAndSortArray() #2 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/cache/includes/elements/modx/revolution/modsnippet/27.include.cache.php(71): CourseProductService->getCourses() #3 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modScript.php(88): include('...') #4 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modParser.php(508): MODX\Revolution\modScript->process() #5 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/components/pdotools/src/Parsing/Parser.php(276): MODX\Revolution\modParser->processTag() #6 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modParser.php(221): ModxPro\PdoTools\Parsing\Parser->processTag() #7 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/components/pdotools/src/Parsing/Parser.php(73): MODX\Revolution\modParser->processElementTags() #8 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modResource.php(534): ModxPro\PdoTools\Parsing\Parser->processElementTags() #9 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modResource.php(482): MODX\Revolution\modResource->parseContent() #10 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modResponse.php(72): MODX\Revolution\modResource->prepare() #11 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modRequest.php(154): MODX\Revolution\modResponse->outputContent() #12 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modRequest.php(138): MODX\Revolution\modRequest->prepareResponse() #13 /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/src/Revolution/modX.php(1512): MODX\Revolution\modRequest->handleRequest() #14 /var/www/vhosts/kochatelier-bonn.de/www/public_html/index.php(63): MODX\Revolution\modX->handleRequest() #15 {main} thrown in /var/www/vhosts/kochatelier-bonn.de/www/public_html/core/components/commerce_courseproduct/model/commerce_courseproduct/courseproductservice.class.php on line 368