I was using WordPress 2.6.1 and it worked well until yesterday.
Today, suddely I met an error when I visited the starting page. Even when I tried to access the admin page, I got the same following error messages.
Warning: require(C:\xampp\htdocs\blog/wp-includes/pluggable.php) [function.require]: failed to open stream: No such file or directory in C:\xampp\htdocs\blog\wp-settings.php on line 430
Fatal error: require() [function.require]: Failed opening required 'C:\xampp\htdocs\blog/wp-includes/pluggable.php' (include_path='.;C:\xampp\php\pear\') in C:\xampp\htdocs\blog\wp-settings.php on line 430
I tried to find pluggable.php at the Internet and upload it to /wp-includes/ directory, but it did not help.
Can anybody assist me to solve this issue?