Warning: Declaration of FormRecipient::processFormData($arrSubmitted, $arrLabels) should be compatible with Contao\Form::processFormData($arrSubmitted, $arrLabels, $arrFields) in system/modules/formrecipient/FormRecipient.php on line 12

#0 system/modules/formrecipient/FormRecipient.php(12): __error(2, 'Declaration of ...', '/is/htdocs/wp10...', 12, Array)
#1 system/modules/core/library/Contao/ClassLoader.php(148): include('/is/htdocs/wp10...')
#2 [internal function]: Contao\ClassLoader::load('FormRecipient')
#3 [internal function]: spl_autoload_call('FormRecipient')
#4 system/modules/core/library/Contao/Controller.php(302): class_exists('FormRecipient')
#5 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule(Object(Contao\ModuleModel), 'header')
#6 system/modules/core/controllers/FrontendIndex.php(267): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#7 index.php(20): Contao\FrontendIndex->run()
#8 {main}

Fatal error: Uncaught exception Error with message Function name must be a string thrown in system/modules/core/classes/FrontendTemplate.php on line 89

#0 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#1 system/modules/core/controllers/FrontendIndex.php(267): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#2 index.php(20): Contao\FrontendIndex->run()
#3 {main}