@King Fly: It's seem that there is some problem with the installer (the error told that 1 of kBank's table is missing). You can disable plugin system by editing your global.php in your root folder. Find this line:
PHP Code:
define('VB_AREA', 'Forum');
Insert this line after that one:
PHP Code:
define('DISABLE_HOOKS', true);
Now you can access your forum and disable/uninstall kBank (or you can try to reinstall it again). Good luck