Plugin Warning

Al instalar este plugin “wp-e-commerce-catalog-visibility-and-email-inquiry” , y al activarlo aparece una pagina en blanco con estos mensajes

Warning: fopen(/homepages/31/d590854045/htdocs/clickandbuilds/CMS0/wp-content/plugins/wp-e-commerce/wp-shopping-cart.php): failed to open stream: No such file or directory in /homepages/31/d590854045/htdocs/clickandbuilds/CMS0/wp-includes/functions.php on line 4305

Warning: fread() expects parameter 1 to be resource, boolean given in /homepages/31/d590854045/htdocs/clickandbuilds/CMS0/wp-includes/functions.php on line 4308

Warning: fclose() expects parameter 1 to be resource, boolean given in /homepages/31/d590854045/htdocs/clickandbuilds/CMS0/wp-includes/functions.php on line 4311

Warning: Cannot modify header information – headers already sent by (output started at /homepages/31/d590854045/htdocs/clickandbuilds/CMS0/wp-includes/functions.php:4305) in /homepages/31/d590854045/htdocs/clickandbuilds/CMS0/wp-includes/pluggable.php on line 1207

¿Alguien puede decirme si se puede arreglar (no se programar), o si lo debo desinstalar?
Muchas gracias