Unkown field name "size"

[placementedge]

The size attribute is properly mapped but I'm getting this error (configurable/simple):

2015-08-21T04:40:17+00:00 ERR (3):
exception 'Google_Service_Exception' with message 'Error calling POST https://www.googleapis.com/content/v2/105758713/products: (400) Unknown field name: size' in /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Http/REST.php:110
Stack trace:
#0 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Http/REST.php(62): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client))
#1 [internal function]: Google_Http_REST::doExecute(Object(Google_Client), Object(Google_Http_Request))
#2 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Task/Runner.php(174): call_user_func_array(Array, Array)
#3 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Http/REST.php(46): Google_Task_Runner->run()
#4 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Client.php(590): Google_Http_REST::execute(Object(Google_Client), Object(Google_Http_Request))
#5 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Service/Resource.php(237): Google_Client->execute(Object(Google_Http_Request))
#6 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Service/ShoppingContent.php(1419): Google_Service_Resource->call('insert', Array, 'Google_Service_...')
#7 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/GoogleShopping.php(193): Google_Service_ShoppingContent_Products_Resource->insert('105758713', Object(Google_Service_ShoppingContent_Product))
#8 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/Service/Item.php(26): Zookal_GShoppingV2_Model_GoogleShopping->insertProduct(Object(Google_Service_ShoppingContent_Product), '1')
#9 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/Item.php(100): Zookal_GShoppingV2_Model_Service_Item->insert(Object(Zookal_GShoppingV2_Model_Item))
#10 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/MassOperations.php(80): Zookal_GShoppingV2_Model_Item->insertItem(Object(Mage_Catalog_Model_Product))
#11 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/controllers/Adminhtml/GShoppingV2/ItemsController.php(122): Zookal_GShoppingV2_Model_MassOperations->addProducts(Array, '1')
#12 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Zookal_GShoppingV2_Adminhtml_GShoppingV2_ItemsController->massAddAction()
#13 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('massAdd')
#14 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#15 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#16 /srv/www/sampledomain.com/public_html/app/Mage.php(692): Mage_Core_Model_App->run(Array)
#17 /srv/www/sampledomain.com/public_html/index.php(93): Mage::run('default', 'store')
#18 {main}

2015-08-21T04:42:13+00:00 ERR (3):
exception 'Google_Service_Exception' with message 'Error calling POST https://www.googleapis.com/content/v2/105758713/products: (400) [size] validation/missing_required for Shopping,ShoppingApi,ShoppingExpress: Missing required attribute: size' in /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Http/REST.php:110
Stack trace:
#0 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Http/REST.php(62): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client))
#1 [internal function]: Google_Http_REST::doExecute(Object(Google_Client), Object(Google_Http_Request))
#2 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Task/Runner.php(174): call_user_func_array(Array, Array)
#3 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Http/REST.php(46): Google_Task_Runner->run()
#4 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Client.php(590): Google_Http_REST::execute(Object(Google_Client), Object(Google_Http_Request))
#5 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Service/Resource.php(237): Google_Client->execute(Object(Google_Http_Request))
#6 /srv/www/sampledomain.com/public_html/vendor/google/apiclient/src/Google/Service/ShoppingContent.php(1419): Google_Service_Resource->call('insert', Array, 'Google_Service_...')
#7 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/GoogleShopping.php(193): Google_Service_ShoppingContent_Products_Resource->insert('105758713', Object(Google_Service_ShoppingContent_Product))
#8 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/Service/Item.php(26): Zookal_GShoppingV2_Model_GoogleShopping->insertProduct(Object(Google_Service_ShoppingContent_Product), '1')
#9 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/Item.php(100): Zookal_GShoppingV2_Model_Service_Item->insert(Object(Zookal_GShoppingV2_Model_Item))
#10 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/Model/MassOperations.php(80): Zookal_GShoppingV2_Model_Item->insertItem(Object(Mage_Catalog_Model_Product))
#11 /srv/www/sampledomain.com/public_html/app/code/community/Zookal/GShoppingV2/controllers/Adminhtml/GShoppingV2/ItemsController.php(122): Zookal_GShoppingV2_Model_MassOperations->addProducts(Array, '1')
#12 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Zookal_GShoppingV2_Adminhtml_GShoppingV2_ItemsController->massAddAction()
#13 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('massAdd')
#14 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#15 /srv/www/sampledomain.com/public_html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#16 /srv/www/sampledomain.com/public_html/app/Mage.php(692): Mage_Core_Model_App->run(Array)