#0 system/modules/hc_mailchimp/modules/ModuleHcMailchimpSubscribeForm.php(59): __error(2, 'Invalid argumen...', '/var/www/client...', 59, Array)
#1 system/modules/hc_mailchimp/modules/ModuleHcMailchimpSubscribeForm.php(46): ModuleHcMailchimpSubscribeForm->createForm(Object(MCAPI), '5b9cc3b3fa', 'DD-MM-YYYY', '')
#2 system/modules/core/modules/Module.php(148): ModuleHcMailchimpSubscribeForm->compile()
#3 system/modules/core/elements/ContentModule.php(63): Contao\Module->generate()
#4 system/modules/core/library/Contao/Controller.php(456): Contao\ContentModule->generate()
#5 system/modules/core/modules/ModuleArticle.php(205): Contao\Controller->getContentElement(Object(Contao\ContentModel), 'main')
#6 system/modules/core/modules/Module.php(148): Contao\ModuleArticle->compile()
#7 system/modules/core/modules/ModuleArticle.php(59): Contao\Module->generate()
#8 system/modules/core/library/Contao/Controller.php(392): Contao\ModuleArticle->generate(false)
#9 system/modules/core/library/Contao/Controller.php(254): Contao\Controller->getArticle(Object(Contao\ArticleModel), false, false, 'main')
#10 system/modules/core/pages/PageRegular.php(138): Contao\Controller->getFrontendModule('0', 'main')
#11 index.php(250): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#12 index.php(434): Index->run()
#13 {main}