Hello Володимир,

Thank you for reaching out to us.

Regarding the issues you’re facing:

1. The error message “Class ‘Symfony\Component\Validator\Constraints\Required’ not found” typically occurs when there’s a missing or incompatible class due to an extension or template conflict. I recommend ensuring that your Joomla installation and all extensions are up-to-date.
2. CSS Changes Reverting: This sounds like a caching issue. I suggest the following steps: • Clear Joomla Cache: Go to “System” -> “Clear Cache” in your Joomla admin panel and clear the cache. • Disable Template Caching: If the issue continues, you may want to disable caching for the template or try clearing the browser cache as well.

If these solutions don’t resolve your problems, please feel free to provide more details, and we can assist you further.

Let us know if you need any more help!

Best regards,

Unfortunately, I can't update either Joomla or plugins, the same error is repeated: Class "Symfony\Component\Validator\Constraints\Required" not found

Call Stack

Function Location

1 () JROOT/libraries/vendor/php-tuf/php-tuf/src/Metadata/MetadataBase.php:104 2 Tuf\Metadata\MetadataBase::getConstraints() JROOT/libraries/vendor/php-tuf/php-tuf/src/Metadata/MetadataBase.php:91 3 Tuf\Metadata\MetadataBase::createFromJson() JROOT/libraries/vendor/php-tuf/php-tuf/src/Metadata/StorageBase.php:40 4 Tuf\Metadata\StorageBase->getRoot() JROOT/libraries/vendor/php-tuf/php-tuf/src/Client/Updater.php:138 5 Tuf\Client\Updater->refresh() JROOT/libraries/src/TUF/TufFetcher.php:118 6 Joomla\CMS\TUF\TufFetcher->getValidUpdate() JROOT/libraries/src/Updater/Adapter/TufAdapter.php:84 7 Joomla\CMS\Updater\Adapter\TufAdapter->getUpdateTargets() JROOT/libraries/src/Updater/Adapter/TufAdapter.php:50 8 Joomla\CMS\Updater\Adapter\TufAdapter->findUpdate() JROOT/libraries/src/Updater/Updater.php:263 9 Joomla\CMS\Updater\Updater->getUpdateObjectsForSite() JROOT/libraries/src/Updater/Updater.php:164 10 Joomla\CMS\Updater\Updater->findUpdates() JROOT/administrator/components/com_joomlaupdate/src/Model/UpdateModel.php:183 11 Joomla\Component\Joomlaupdate\Administrator\Model\UpdateModel->refreshUpdates() JROOT/administrator/components/com_joomlaupdate/src/Controller/DisplayController.php:81 12 Joomla\Component\Joomlaupdate\Administrator\Controller\DisplayController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:730 13 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143 14 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361 15 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:150 16 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:195 17 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:306 18 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:58 19 require_once() JROOT/administrator/index.php:32

I provide you with a login and password to enter the administrative panel

Will someone help me or is it not realistic?