Fatal error: Uncaught Error: Class "Firebear\ImportExport\Plugin\Magento\Framework\Serialize\Serializer\Json" not found in /chroot/home/a3f7999d/staging/vendor/magento/framework/ObjectManager/Factory/Compiled.php:60
Stack trace:
#0 /chroot/home/a3f7999d/staging/vendor/magento/framework/ObjectManager/ObjectManager.php(73): Magento\Framework\ObjectManager\Factory\Compiled->create('Firebear\\Import...')
#1 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/PluginList/PluginList.php(173): Magento\Framework\ObjectManager\ObjectManager->get('Firebear\\Import...')
#2 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(133): Magento\Framework\Interception\PluginList\PluginList->getPlugin('Magento\\Framewo...', 'Firebear_Import...')
#3 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\Serialize\Serializer\Json\Interceptor->{closure:Magento\Framework\Interception\Interceptor::___callPlugins():104}('[["0","1","2","...')
#4 /chroot/home/a3f7999d/staging/generated/code/Magento/Framework/Serialize/Serializer/Json/Interceptor.php(31): Magento\Framework\Serialize\Serializer\Json\Interceptor->___callPlugins('unserialize', Array, NULL)
#5 /chroot/home/a3f7999d/staging/vendor/magento/module-store/Model/StoresData.php(64): Magento\Framework\Serialize\Serializer\Json\Interceptor->unserialize('[["0","1","2","...')
#6 /chroot/home/a3f7999d/staging/vendor/magento/module-store/Model/StoreResolver.php(168): Magento\Store\Model\StoresData->getStoresData('store', 'TMT_V')
#7 /chroot/home/a3f7999d/staging/vendor/magento/module-store/Model/StoreResolver.php(126): Magento\Store\Model\StoreResolver->getStoresData()
#8 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Store\Model\StoreResolver->getCurrentStoreId()
#9 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Store\Model\StoreResolver\Interceptor->___callParent('getCurrentStore...', Array)
#10 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Store\Model\StoreResolver\Interceptor->{closure:Magento\Framework\Interception\Interceptor::___callPlugins():104}()
#11 /chroot/home/a3f7999d/staging/generated/code/Magento/Store/Model/StoreResolver/Interceptor.php(23): Magento\Store\Model\StoreResolver\Interceptor->___callPlugins('getCurrentStore...', Array, Array)
#12 /chroot/home/a3f7999d/staging/generated/code/Magento/Store/Model/StoreResolver/Proxy.php(105): Magento\Store\Model\StoreResolver\Interceptor->getCurrentStoreId()
#13 /chroot/home/a3f7999d/staging/vendor/magento/module-store/Model/StoreManager.php(159): Magento\Store\Model\StoreResolver\Proxy->getCurrentStoreId()
#14 /chroot/home/a3f7999d/staging/generated/code/Magento/Store/Model/StoreManagerInterface/Proxy.php(129): Magento\Store\Model\StoreManager->getStore(NULL)
#15 /chroot/home/a3f7999d/staging/vendor/magento/module-store/Model/Resolver/Store.php(30): Magento\Store\Model\StoreManagerInterface\Proxy->getStore(NULL)
#16 /chroot/home/a3f7999d/staging/vendor/magento/framework/App/Config/ScopeCodeResolver.php(49): Magento\Store\Model\Resolver\Store->getScope(NULL)
#17 /chroot/home/a3f7999d/staging/vendor/magento/framework/App/Config.php(63): Magento\Framework\App\Config\ScopeCodeResolver->resolve('stores', NULL)
#18 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Config->getValue('csp/general/ena...', 'stores', NULL)
#19 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\Config\Interceptor->___callParent('getValue', Array)
#20 /chroot/home/a3f7999d/staging/app/code/MageWorx/ShippingRules/Model/Plugin/AddMethods.php(122): Magento\Framework\App\Config\Interceptor->{closure:Magento\Framework\Interception\Interceptor::___callPlugins():104}('csp/general/ena...', 'store', NULL)
#21 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(135): MageWorx\ShippingRules\Model\Plugin\AddMethods->aroundGetValue(Object(Magento\Framework\App\Config\Interceptor), Object(Closure), 'csp/general/ena...', 'store', NULL)
#22 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Config\Interceptor->{closure:Magento\Framework\Interception\Interceptor::___callPlugins():104}('csp/general/ena...', 'store', NULL)
#23 /chroot/home/a3f7999d/staging/generated/code/Magento/Framework/App/Config/Interceptor.php(23): Magento\Framework\App\Config\Interceptor->___callPlugins('getValue', Array, NULL)
#24 /chroot/home/a3f7999d/staging/vendor/magento/framework/App/Config.php(82): Magento\Framework\App\Config\Interceptor->getValue('csp/general/ena...', 'store', NULL)
#25 /chroot/home/a3f7999d/staging/app/code/Hryvinskyi/Csp/Model/Config.php(59): Magento\Framework\App\Config->isSetFlag('csp/general/ena...', 'store', NULL)
#26 /chroot/home/a3f7999d/staging/app/code/Hryvinskyi/Csp/Plugin/Framework/App/Response/HttpInterface/FixSendCspReport.php(36): Hryvinskyi\Csp\Model\Config->isReportsEnabled()
#27 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(121): Hryvinskyi\Csp\Plugin\Framework\App\Response\HttpInterface\FixSendCspReport->beforeSetHeader(Object(Magento\Framework\HTTP\PhpEnvironment\Response\Interceptor), 'Content-Type', 'text/plain')
#28 /chroot/home/a3f7999d/staging/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\HTTP\PhpEnvironment\Response\Interceptor->{closure:Magento\Framework\Interception\Interceptor::___callPlugins():104}('Content-Type', 'text/plain')
#29 /chroot/home/a3f7999d/staging/generated/code/Magento/Framework/HTTP/PhpEnvironment/Response/Interceptor.php(31): Magento\Framework\HTTP\PhpEnvironment\Response\Interceptor->___callPlugins('setHeader', Array, Array)
#30 /chroot/home/a3f7999d/staging/vendor/magento/framework/App/Bootstrap.php(436): Magento\Framework\HTTP\PhpEnvironment\Response\Interceptor->setHeader('Content-Type', 'text/plain')
#31 /chroot/home/a3f7999d/staging/vendor/magento/framework/App/Bootstrap.php(275): Magento\Framework\App\Bootstrap->terminate(Object(Error))
#32 /chroot/home/a3f7999d/staging/pub/index.php(36): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor))
#33 {main}
  thrown in /chroot/home/a3f7999d/staging/vendor/magento/framework/ObjectManager/Factory/Compiled.php on line 60