Error: 0 Class "Joomla\CMS\HTML\Helpers\Sidebar" not found

please enable the debug in your website to give the full error path

ERROR REPORT WITH DEBUG ACTIVATED

An error occurred.
0 Class "Joomla\CMS\Form\Field\ListField" not found
/web/htdocs/www.cilentotop.it/home/plugins/accordeonmenuck/k2/elements/ckk2category.php:14
Call stack
#    Function    Location
1    ()    JROOT/plugins/accordeonmenuck/k2/elements/ckk2category.php:14
2    require_once()    JROOT/libraries/src/Form/FormHelper.php:243
3    Joomla\CMS\Form\FormHelper::loadClass()    JROOT/libraries/src/Form/FormHelper.php:120
4    Joomla\CMS\Form\FormHelper::loadType()    JROOT/libraries/src/Form/FormHelper.php:76
5    Joomla\CMS\Form\FormHelper::loadFieldType()    JROOT/libraries/src/Form/Form.php:1985
6    Joomla\CMS\Form\Form->loadFieldType()    JROOT/libraries/src/Form/Form.php:1922
7    Joomla\CMS\Form\Form->loadField()    JROOT/libraries/src/Form/Form.php:359
8    Joomla\CMS\Form\Form->getFieldset()    JROOT/layouts/joomla/edit/fieldset.php:16
9    include()    JROOT/libraries/src/Layout/FileLayout.php:125
10    Joomla\CMS\Layout\FileLayout->render()    JROOT/libraries/src/Layout/LayoutHelper.php:73
11    Joomla\CMS\Layout\LayoutHelper::render()    JROOT/layouts/joomla/edit/params.php:123
12    include()    JROOT/libraries/src/Layout/FileLayout.php:125
13    Joomla\CMS\Layout\FileLayout->render()    JROOT/libraries/src/Layout/LayoutHelper.php:73
14    Joomla\CMS\Layout\LayoutHelper::render()    JROOT/administrator/components/com_modules/views/module/tmpl/edit.php:280
15    include()    JROOT/libraries/src/MVC/View/HtmlView.php:701
16    Joomla\CMS\MVC\View\HtmlView->loadTemplate()    JROOT/libraries/src/MVC/View/HtmlView.php:230
17    Joomla\CMS\MVC\View\HtmlView->display()    JROOT/administrator/components/com_modules/views/module/view.html.php:46
18    ModulesViewModule->display()    JROOT/libraries/src/MVC/Controller/BaseController.php:664
19    Joomla\CMS\MVC\Controller\BaseController->display()    JROOT/administrator/components/com_modules/controller.php:121
20    ModulesController->display()    JROOT/libraries/src/MVC/Controller/BaseController.php:702
21    Joomla\CMS\MVC\Controller\BaseController->execute()    JROOT/administrator/components/com_modules/modules.php:23
22    require_once()    JROOT/libraries/src/Component/ComponentHelper.php:402
23    Joomla\CMS\Component\ComponentHelper::executeComponent()    JROOT/libraries/src/Component/ComponentHelper.php:377
24    Joomla\CMS\Component\ComponentHelper::renderComponent()    JROOT/libraries/src/Application/AdministratorApplication.php:101
25    Joomla\CMS\Application\AdministratorApplication->dispatch()    JROOT/libraries/src/Application/AdministratorApplication.php:159
26    Joomla\CMS\Application\AdministratorApplication->doExecute()    JROOT/libraries/src/Application/CMSApplication.php:225
27    Joomla\CMS\Application\CMSApplication->execute()    JROOT/administrator/index.php:51

Thanks to the availability.
Greetings
Mimmo
 

Hi
Please install this plugin update and tell me if it is ok now
www.dropbox.com/s/tjcqwltrox2d3nz/k2.zip?dl=0

CEd

Hello

Now everything works fine.

Thank you