can you please help me rectify these errors?

Warning: fopen(/home/feen486/public_html/wp-content/plugins/membership/membershippremium.php) [function.fopen]: failed to open stream: No such file or directory in /home/feen486/public_html/wp-includes/functions.php on line 4339

Warning: fread(): supplied argument is not a valid stream resource in /home/feen486/public_html/wp-includes/functions.php on line 4342

Warning: fclose(): supplied argument is not a valid stream resource in /home/feen486/public_html/wp-includes/functions.php on line 4345