Notice: Undefined index: validate_argument_node_access_op in views_plugin_argument_validate_node->convert_options()

$view = new view;
$view->name = 'backlinks';
$view->description = 'Displays a list of nodes that link to the node, using the search backlinks table.';
$view->tag = 'default';
$view->base_table = 'node';
$view->human_name = '';
$view->core = 0;
$view->api_version = '3.0-alpha1';
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */

/* Display: Defaults */
$handler = $view->new_display('default', 'Defaults', 'default');
$handler->display->display_options['access']['type'] = 'none';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['query']['type'] = 'views_query';
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'full';
$handler->display->display_options['pager']['options']['items_per_page'] = 30;
$handler->display->display_options['style_plugin'] = 'list';
$handler->display->display_options['style_options']['type'] = 'ol';
$handler->display->display_options['row_plugin'] = 'fields';
/* No results behavior: Global: Text area */
$handler->display->display_options['empty']['text']['id'] = 'area';
$handler->display->display_options['empty']['text']['table'] = 'views';
$handler->display->display_options['empty']['text']['field'] = 'area';
$handler->display->display_options['empty']['text']['empty'] = FALSE;
$handler->display->display_options['empty']['text']['content'] = 'No backlinks found.';
$handler->display->display_options['empty']['text']['format'] = '1';
/* Field: Content: Title */
$handler->display->display_options['fields']['title']['id'] = 'title';
$handler->display->display_options['fields']['title']['table'] = 'node';
$handler->display->display_options['fields']['title']['field'] = 'title';
$handler->display->display_options['fields']['title']['label'] = '';
$handler->display->display_options['fields']['title']['link_to_node'] = 1;
/* Contextual filter: Search: Links to */
$handler->display->display_options['arguments']['nid']['id'] = 'nid';
$handler->display->display_options['arguments']['nid']['table'] = 'search_node_links_to';
$handler->display->display_options['arguments']['nid']['field'] = 'nid';
$handler->display->display_options['arguments']['nid']['default_action'] = 'not found';
$handler->display->display_options['arguments']['nid']['title_enable'] = 1;
$handler->display->display_options['arguments']['nid']['title'] = 'Pages that link to %1';
$handler->display->display_options['arguments']['nid']['default_argument_type'] = 'fixed';
$handler->display->display_options['arguments']['nid']['summary']['format'] = 'default_summary';
$handler->display->display_options['arguments']['nid']['specify_validation'] = 1;
$handler->display->display_options['arguments']['nid']['validate']['type'] = 'node';
/* Filter criterion: Content: Published */
$handler->display->display_options['filters']['status']['id'] = 'status';
$handler->display->display_options['filters']['status']['table'] = 'node';
$handler->display->display_options['filters']['status']['field'] = 'status';
$handler->display->display_options['filters']['status']['value'] = 1;
$handler->display->display_options['filters']['status']['group'] = 0;
$handler->display->display_options['filters']['status']['expose']['operator'] = FALSE;

/* Display: Page */
$handler = $view->new_display('page', 'Page', 'page');
$handler->display->display_options['defaults']['access'] = FALSE;
$handler->display->display_options['access']['type'] = 'role';
$handler->display->display_options['access']['role'] = array(
  3 => '3',
  2 => '2',
);
$handler->display->display_options['path'] = 'node/%/backlinks';
$handler->display->display_options['menu']['title'] = 'What links here';
$handler->display->display_options['menu']['weight'] = '0';

/* Display: Block */
$handler = $view->new_display('block', 'Block', 'block');
$handler->display->display_options['defaults']['title'] = FALSE;
$handler->display->display_options['title'] = 'What links here';
$handler->display->display_options['defaults']['items_per_page'] = FALSE;
$handler->display->display_options['defaults']['use_more'] = FALSE;
$handler->display->display_options['use_more'] = TRUE;
$handler->display->display_options['defaults']['style_plugin'] = FALSE;
$handler->display->display_options['style_plugin'] = 'list';
$handler->display->display_options['defaults']['style_options'] = FALSE;
$handler->display->display_options['defaults']['row_plugin'] = FALSE;
$handler->display->display_options['row_plugin'] = 'fields';
$handler->display->display_options['defaults']['row_options'] = FALSE;
$handler->display->display_options['defaults']['arguments'] = FALSE;
/* Contextual filter: Search: Links to */
$handler->display->display_options['arguments']['nid']['id'] = 'nid';
$handler->display->display_options['arguments']['nid']['table'] = 'search_node_links_to';
$handler->display->display_options['arguments']['nid']['field'] = 'nid';
$handler->display->display_options['arguments']['nid']['default_action'] = 'default';
$handler->display->display_options['arguments']['nid']['title_enable'] = 1;
$handler->display->display_options['arguments']['nid']['title'] = 'What links here';
$handler->display->display_options['arguments']['nid']['default_argument_type'] = 'node';
$handler->display->display_options['arguments']['nid']['summary']['format'] = 'default_summary';
$handler->display->display_options['arguments']['nid']['specify_validation'] = 1;
$handler->display->display_options['arguments']['nid']['validate']['type'] = 'node';
$handler->display->display_options['block_description'] = 'What links here';
$translatables['backlinks'] = array(
  t('Defaults'),
  t('more'),
  t('Apply'),
  t('Reset'),
  t('Sort by'),
  t('Asc'),
  t('Desc'),
  t('Items per page'),
  t('- All -'),
  t('Offset'),
  t('No backlinks found.'),
  t('All'),
  t('Pages that link to %1'),
  t('Page'),
  t('Block'),
  t('What links here'),
);

I was getting the errors on pages where "What links here" was in a block. The node/%/backlinks pages load without a problem. I'm debugging this more as we speak.... a revert doesnt even fix this. Might be a conflicting module?

excellent! commit?

I apologize for not giving this a better look earlier.

It removes the errors but I am unable to produce a block. I cleared all caches and double checked the visibility settings. No dice. I'll further test.

I'll do the best I can here..

• Patch from #4 was applied to my site.
• "What links here" tab was removed from page display. Block is set on to appear in left sidebar on node view instead.
• "What links here" isn't working at all - even on nodes where it should for sure.

I did not test re-indexing search/running cron at this point (that's probably by it wasn't working). What I did next was:

• Reverse patch in #4.
• Enable "What links here" tab on page display. Keep block set on to appear in left sidebar on node view.
• Re-index search and run cron.
• "What links here" node tab does display correctly, without errors defined in this issue's description. (node/%/backlinks)
• "What links here" block does not display on node view in left sidebar. I get the errors in this issue's description.

To conclude... The patch makes the errors go away but I'm still unable to get the block to appear.

I think this patch can be committed and this issue fixed as it solves the error. The backlinks block not displaying is another issue. Thanks Merlin for your time!

I created #1127446: Backlinks view does not display "What links here" block on node view to address the backlinks block issue.