Fatal error: Uncaught exception Error with message Function name must be a string thrown in system/modules/isotope/library/Isotope/Model/Product/Standard.php on line 634
#0 system/modules/isotope/library/Isotope/Module/ProductReader.php(111): Isotope\Model\Product\Standard->generate(Array)
#1 system/modules/core/modules/Module.php(287): Isotope\Module\ProductReader->compile()
#2 system/modules/isotope/library/Isotope/Module/Module.php(86): Contao\Module->generate()
#3 system/modules/isotope/library/Isotope/Module/ProductReader.php(74): Isotope\Module\Module->generate()
#4 system/modules/core/elements/ContentModule.php(59): Isotope\Module\ProductReader->generate()
#5 system/modules/core/library/Contao/Controller.php(484): Contao\ContentModule->generate()
#6 system/modules/core/modules/ModuleArticle.php(213): Contao\Controller::getContentElement(Object(Contao\ContentModel), 'main')
#7 system/modules/core/modules/Module.php(287): Contao\ModuleArticle->compile()
#8 system/modules/core/modules/ModuleArticle.php(67): Contao\Module->generate()
#9 system/modules/core/library/Contao/Controller.php(417): Contao\ModuleArticle->generate(false)
#10 system/modules/core/library/Contao/Controller.php(277): Contao\Controller::getArticle(Object(Contao\ArticleModel), false, false, 'main')
#11 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule('0', 'main')
#12 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#13 index.php(20): Contao\FrontendIndex->run()
#14 {main}