All of a sudden I can’t login to admin! Please help!

Hello,

I’m having trouble logging into Admin today. Today there wasn’t a problem. I noticed my website (www.kaifitaustin.com) is showing errors:

Warning: include_once(): Failed opening ‘/home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder//inc/ssba_admin_bits.php’ for inclusion (include_path=’.:/usr/local/php5_4/lib/php’) in /home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder/simple-share-buttons-adder.php on line 50

Warning: include_once(/home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder//inc/ssba_buttons.php): failed to open stream: No such file or directory in /home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder/simple-share-buttons-adder.php on line 51

and when I attempted to login to the admin to investigate the system wouldn’t recognize my password (worked yesterday). So I attempted to go through the password retrieval process and received and entire page of the following errors and there wasn’t the login box on the page:

Warning: include_once(/home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder//inc/ssba_admin_bits.php): failed to open stream: No such file or directory in /home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder/simple-share-buttons-adder.php on line 50

Warning: include_once(): Failed opening ‘/home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder//inc/ssba_admin_bits.php’ for inclusion (include_path=’.:/usr/local/php5_4/lib/php’) in /home/content/p3pnexwpnas10_data02/42/2832042/html/wp-content/plugins/simple-share-buttons-adder/simple-share-buttons-adder.php on line 50

Please help!