błąd Strict Standards: Non-static method ProductsAdmin::getInstance() should not be called statically in

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Dzień dobry

proszę o waszą pomoc w kontekście błędów które pojawiły się w sklepie quick.cart ver. 3.4 

 

https://www.haccp-polska.pl/haccp_oferta/

 

 

Strict Standards: Non-static method FlatFiles::getInstance() should not be called statically in /home/haccp/public_html/haccp/haccp_oferta/index.php on line 42

Strict Standards: Non-static method TplParser::getInstance() should not be called statically in /home/haccp/public_html/haccp/haccp_oferta/index.php on line 43

Strict Standards: Non-static method Files::getInstance() should not be called statically in /home/haccp/public_html/haccp/haccp_oferta/index.php on line 46

Strict Standards: Non-static method Pages::getInstance() should not be called statically in /home/haccp/public_html/haccp/haccp_oferta/index.php on line 47

Strict Standards: Non-static method Products::getInstance() should not be called statically in /home/haccp/public_html/haccp/haccp_oferta/index.php on line 48

 

Jak można rozwiązać ten problem ? 

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