1 exception(s): Exception #0 (InvalidArgumentException): Unable to unserialize value. Exception #0 (InvalidArgumentException): Unable to unserialize value. #0 D:\Projects\xampp\htdocs\test2\app\code\Magento\User\Model\ResourceModel\User.php(244): Magento\Framework\Serialize\Serializer\Json->unserialize('') #1 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Model\ResourceModel\Db\AbstractDb.php(356): Magento\User\Model\ResourceModel\User->_afterLoad(Object(Magento\User\Model\User\Interceptor)) #2 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Model\AbstractModel.php(536): Magento\Framework\Model\ResourceModel\Db\AbstractDb->load(Object(Magento\User\Model\User\Interceptor), '1', 'user_id') #3 D:\Projects\xampp\htdocs\test2\generated\code\Magento\User\Model\User\Interceptor.php(765): Magento\Framework\Model\AbstractModel->load('1', NULL) #4 D:\Projects\xampp\htdocs\test2\app\code\Magento\User\Model\User.php(618): Magento\User\Model\User\Interceptor->load('1') #5 D:\Projects\xampp\htdocs\test2\generated\code\Magento\User\Model\User\Interceptor.php(232): Magento\User\Model\User->reload() #6 D:\Projects\xampp\htdocs\test2\app\code\Magento\Backend\App\Action\Plugin\Authentication.php(122): Magento\User\Model\User\Interceptor->reload() #7 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Interception\Interceptor.php(135): Magento\Backend\App\Action\Plugin\Authentication->aroundDispatch(Object(Magento\Backend\Controller\Adminhtml\Dashboard\Index\Interceptor), Object(Closure), Object(Magento\Framework\App\Request\Http)) #8 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Interception\Interceptor.php(153): Magento\Backend\Controller\Adminhtml\Dashboard\Index\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Request\Http)) #9 D:\Projects\xampp\htdocs\test2\generated\code\Magento\Backend\Controller\Adminhtml\Dashboard\Index\Interceptor.php(39): Magento\Backend\Controller\Adminhtml\Dashboard\Index\Interceptor->___callPlugins('dispatch', Array, NULL) #10 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\App\FrontController.php(55): Magento\Backend\Controller\Adminhtml\Dashboard\Index\Interceptor->dispatch(Object(Magento\Framework\App\Request\Http)) #11 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Interception\Interceptor.php(58): Magento\Framework\App\FrontController->dispatch(Object(Magento\Framework\App\Request\Http)) #12 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Interception\Interceptor.php(138): Magento\Framework\App\FrontController\Interceptor->___callParent('dispatch', Array) #13 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\Interception\Interceptor.php(153): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}(Object(Magento\Framework\App\Request\Http)) #14 D:\Projects\xampp\htdocs\test2\generated\code\Magento\Framework\App\FrontController\Interceptor.php(26): Magento\Framework\App\FrontController\Interceptor->___callPlugins('dispatch', Array, Array) #15 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\App\Http.php(135): Magento\Framework\App\FrontController\Interceptor->dispatch(Object(Magento\Framework\App\Request\Http)) #16 D:\Projects\xampp\htdocs\test2\generated\code\Magento\Framework\App\Http\Interceptor.php(24): Magento\Framework\App\Http->launch() #17 D:\Projects\xampp\htdocs\test2\lib\internal\Magento\Framework\App\Bootstrap.php(256): Magento\Framework\App\Http\Interceptor->launch() #18 D:\Projects\xampp\htdocs\test2\index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor)) #19 {main}
Hello @Shikha710
seems like you upgrade magento 2 and some data into serilize form and magento 2 latest version json decode so that issue come
try below solution for same
The problem is in /vendor/magento/framework/Serialize/Serializer/Json.php
and I used the solution in below link. Changing a code in json.php
It working fine for now.
https://magento.stackexchange.com/questions/194010/magento-2-2-unable-to-unserialize-value
if works then mark as solution