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Magento 2.2：无法反序列化值？
在运行Magento 2.2.0-rc3.0 / PHP 7.0.23的网站上遇到问题 启用或禁用所有第3方扩展时，都会发生以下问题。 从类别或产品页面向比较中添加项目或从产品页面提交评论时，在浏览器中出现以下错误： 1 exception(s): Exception #0 (InvalidArgumentException): Unable to unserialize value. Exception #0 (InvalidArgumentException): Unable to unserialize value. #0 /home/___/public_html/app/code/Magento/Theme/Controller/Result/MessagePlugin.php(157): Magento\Framework\Serialize\Serializer\Json->unserialize('[{\\"type\\":\\"su...') #1 /home/___/public_html/app/code/Magento/Theme/Controller/Result/MessagePlugin.php(135): Magento\Theme\Controller\Result\MessagePlugin->getCookiesMessages() #2 /home/___/public_html/app/code/Magento/Theme/Controller/Result/MessagePlugin.php(84): Magento\Theme\Controller\Result\MessagePlugin->getMessages() #3 /home/___/public_html/lib/internal/Magento/Framework/Interception/Interceptor.php(146): Magento\Theme\Controller\Result\MessagePlugin->afterRenderResult(Object(Magento\Framework\View\Result\Page\Interceptor), Object(Magento\Framework\View\Result\Page\Interceptor), Object(Magento\Framework\App\Response\Http\Interceptor)) #4 /home/___/public_html/lib/internal/Magento/Framework/Interception/Interceptor.php(153): Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Response\Http\Interceptor)) #5 /home/___/public_html/generated/code/Magento/Framework/View/Result/Page/Interceptor.php(26): Magento\Framework\View\Result\Page\Interceptor->___callPlugins('renderResult', Array, Array) #6 /home/___/public_html/lib/internal/Magento/Framework/App/Http.php(139): Magento\Framework\View\Result\Page\Interceptor->renderResult(Object(Magento\Framework\App\Response\Http\Interceptor)) #7 /home/___/public_html/lib/internal/Magento/Framework/App/Bootstrap.php(256): …