error: Strict Standards: Accessing static property TableProducts::$_cache as non static in /home/  

🙁 buenas noches, me esta generando el virtue mart este aviso interno en el administrador
en la parte superior de la ventana me sale este:

Strict Standards: Only variables should be assigned by reference in /home/salomeus/public_html/plugins/system/favicon/favicon.php on line 31
y en la parte inferior este
error: Strict Standards: Accessing static property TableProducts::$_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 59

Strict Standards: Accessing static property TableProducts::$_query_cache as non static in /home/colfajs/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 60

Strict Standards: Accessing static property TableProduct_medias::$_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 59

Strict Standards: Accessing static property TableProduct_medias::$_query_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 60

Strict Standards: Accessing static property TableVmusers::$_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 59

Strict Standards: Accessing static property TableVmusers::$_query_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 60

Strict Standards: Accessing static property TableVmuser_shoppergroups::$_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 59

Strict Standards: Accessing static property TableVmuser_shoppergroups::$_query_cache as non static in /home/colfaj/public_html/administrator/components/com_virtuemart/helpers/vmtable.php on line 60

Strict Standards: Declaration of TableUserinfos::_modifyColumn() should be compatible with VmTable::_modifyColumn($_act, $_col, $_type = '', $_col2 = '') in /home/colfaj/public_html/administrator/components/com_virtuemart/tables/userinfos.php on line 205

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