Fatal error: Uncaught TypeError: rtrim() expects parameter 1 to be string, bool given in /home/mobikul/www/fooddemo/vendor/magento/framework/Encryption/Adapter/Mcrypt.php:171 Stack trace: #0 /home/mobikul/www/fooddemo/vendor/magento/framework/Encryption/Adapter/Mcrypt.php(171): rtrim(false, '\x00') #1 /home/mobikul/www/fooddemo/vendor/magento/framework/Encryption/Encryptor.php(452): Magento\Framework\Encryption\Adapter\Mcrypt->decrypt(false) #2 /home/mobikul/www/fooddemo/vendor/magento/module-config/Model/Config/Backend/Encrypted.php(111): Magento\Framework\Encryption\Encryptor->decrypt('PayPal') #3 /home/mobikul/www/fooddemo/generated/code/Magento/Config/Model/Config/Backend/Encrypted/Interceptor.php(37): Magento\Config\Model\Config\Backend\Encrypted->processValue('PayPal') #4 /home/mobikul/www/fooddemo/vendor/magento/framework/App/Config/MetadataConfigTypeProcessor.php(133): Magento\Config\Model\Config\Backend\Encrypted\Interceptor->processValue('PayPal') #5 /home/mobikul/www/fooddemo/vendor/magento/framework/App/Config in /home/mobikul/www/fooddemo/vendor/magento/framework/Encryption/Adapter/Mcrypt.php on line 171