I am unable to open my websites template styles for t4, the following error arrises.

0 array_key_exists(): Argument #2 ($array) must be of type array, null given

Function Location

1 () JROOT/plugins/system/t4/admin/layouts/field/colors.php:16
2 include() JROOT/libraries/src/Layout/FileLayout.php:128
3 Joomla\CMS\Layout\FileLayout->render() JROOT/libraries/src/Layout/LayoutHelper.php:76
4 Joomla\CMS\Layout\LayoutHelper::render() JROOT/plugins/system/t4/admin/field/t4color.php:40
5 JFormFieldT4color->getInput() JROOT/libraries/src/Form/FormField.php:482
6 Joomla\CMS\Form\FormField->__get() JROOT/plugins/system/t4/admin/layouts/field/typelist.php:88
7 include() JROOT/libraries/src/Layout/FileLayout.php:128
8 Joomla\CMS\Layout\FileLayout->render() JROOT/libraries/src/Layout/LayoutHelper.php:76
9 Joomla\CMS\Layout\LayoutHelper::render() JROOT/plugins/system/t4/admin/field/typelist.php:71
10 JFormFieldTypeList->getInput() JROOT/libraries/src/Form/FormField.php:1056
11 Joomla\CMS\Form\FormField->renderField() JROOT/layouts/joomla/edit/fieldset.php:43
12 include() JROOT/libraries/src/Layout/FileLayout.php:128
13 Joomla\CMS\Layout\FileLayout->render() JROOT/libraries/src/Layout/LayoutHelper.php:76
14 Joomla\CMS\Layout\LayoutHelper::render() JROOT/layouts/joomla/edit/params.php:170
15 include() JROOT/libraries/src/Layout/FileLayout.php:128
16 Joomla\CMS\Layout\FileLayout->render() JROOT/libraries/src/Layout/LayoutHelper.php:76
17 Joomla\CMS\Layout\LayoutHelper::render() JROOT/administrator/components/com_templates/tmpl/style/edit.php:115
18 include() JROOT/libraries/src/MVC/View/HtmlView.php:416
19 Joomla\CMS\MVC\View\HtmlView->loadTemplate() JROOT/libraries/src/MVC/View/HtmlView.php:204
20 Joomla\CMS\MVC\View\HtmlView->display() JROOT/administrator/components/com_templates/src/View/Style/HtmlView.php:93
21 Joomla\Component\Templates\Administrator\View\Style\HtmlView->display() JROOT/libraries/src/MVC/Controller/BaseController.php:697
22 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/administrator/components/com_templates/src/Controller/DisplayController.php:68
23 Joomla\Component\Templates\Administrator\Controller\DisplayController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:730
24 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
25 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361
26 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:150
27 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:206
28 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:304
29 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:58
30 require_once() JROOT/administrator/index.php:32