Getting Error Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wp_set_excerpt_length' not found or invalid function name in C:\xampp\htdocs\wordpress\wp-includes\class-wp-hook.php on line 298 about wordpress-starter-theme

[mattbanks]

Looks like you have a typo in function wp_set_excerpt_lenght( $length ). Should be function wp_set_excerpt_length( $length ) to match the name of the function you passed in the filter. 😄