The requested page could not be found error appear in page but page is render correctly-drupal 7
It sounds to me like you only want to show said block on that page and nothing else. You might be better off implementing hook_menu() to register a callback (a page) which displays custom content, instead of creating an empty page and showing a block on that.

It might look something like this:

/**
 * Implements hook_menu().
 */
function MYMODULE_menu() {
  $items['currant-trustees'] = array(
    'page callback' =&gt; 'MYMODULE_currant_trustees',
    'title' =&gt; 'Currant trustees',
    'type' =&gt; MENU_CALLBACK,
  );
  return $items;
}
function MYMODULE_currant_trustees() {
  $content = 'This is where your content should go, just copy the code from the block content';

  return $content;
}