"You are not authorized to access this page." when attempting to access Context, Layout or Content

What is the actual panelizer configuration for that content type? Is it panelized? Has a default? Has a panel choice?

One thing I will say -- you have a totally weird set of tabs there. On a similar, functioning page, I have *completely* different tabs.

The UI you're looking at is an alternative version of the UI you will find at admin/config/content/panelizer which should also let you get to those screens.

I can't come up with any explanation of why it might be working wrong/differently on one site than others, though. Or why your tabs are so different. Though that part might be explainable by Drupal itself, which can hold onto old menu data rather fiercely at times making it difficult to make changes properly.

If you've already cleared caches, then probably not. It's possible wiping the menu_links table of all paths with '%panelizer%' in them and then doing a menu cache clear might help (warning: only do this with drush!) reset things, but I'm not sure.

It might be interesting to get a look at what's in the menu_router and menu_links table for the paths for admin/structure/types/%

Same issue here, it started occurring when I switched from the 2.x branch to the 3.x branch. I also have no access to the node panelizer tab, panelizer #access on node form is always set to FALSE.

I've tried deleting all menu items and clearing the cache, but no go. This is on a development site, so I'm going to try to uninstall panelizer completely and reinstall to see if it solves this problem.

Okay, I've reproduced on a clean install:

1) Install drupal
2) drush @dpl dl panelizer-7.x-3.x-dev
3) drush @dpl dl panels-7.x-3.x-dev
4) drush @dpl en panelizer
5) Go to admin/structure/pages and enable Node Template.
6) Go to admin/config/content/panelizer and enable 'Default' view mode for Article and Page.

7) Go to admin/structure/types/manage/page/panelizer/default/node%253Apage%253Adefault%253Adefault/settings (click 'list' then click 'Settings').

I now get sub tabs but cannot access 'Context', 'Layout', or 'Content':

Also, with the same steps above, I have the following issues:

#1) When viewing the 'Add a new panelizer default', for example at admin/config/content/panelizer/node/page.default/list/add, I get this error:

Warning: Missing argument 1 for PanelizerEntityNode::get_default_display(), called in /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/export_ui/panelizer_defaults_ui.class.php on line 85 and defined in PanelizerEntityNode->get_default_display() (line 81 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityNode.class.php).
Warning: Missing argument 2 for PanelizerEntityNode::get_default_display(), called in /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/export_ui/panelizer_defaults_ui.class.php on line 85 and defined in PanelizerEntityNode->get_default_display() (line 81 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityNode.class.php).
Notice: Undefined variable: bundle in PanelizerEntityNode->get_default_display() (line 82 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityNode.class.php).
Notice: Undefined variable: view_mode in PanelizerEntityNode->get_default_display() (line 82 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityNode.class.php).
Notice: Undefined index: display in PanelizerEntityDefault->get_default_display() (line 1813 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityDefault.class.php).
Notice: Undefined index: display in PanelizerEntityDefault->get_default_display() (line 1813 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityDefault.class.php).
Notice: Undefined variable: view_mode in PanelizerEntityNode->get_default_display() (line 89 of /Applications/MAMP/htdocs/drupal/sites/all/modules/panelizer/plugins/entity/PanelizerEntityNode.class.php).

After adding the panelizer template, I get an error: You are not authorized to access this page.

I posted an issue here earlier: http://drupal.org/node/1772508

#2) The 'allow panel choice' setting doesn't effect the node edit form... the $form['panelizer']['#access'] = FALSE.

It seems pretty simple what's happening here, you can't have a default panel and panel choice.

/**
 * Menu callback to determine if a type has a choice of defaults.
 *
 * We use this to make sure the right tabs appear.
 */
function panelizer_has_no_choice_callback($handler, $bundle, $view_mode = NULL) {
  if (is_string($handler)) {
    $handler = panelizer_entity_plugin_get_handler($handler);
  }

  if (!$handler) {
    return FALSE;
  }

  if ($view_mode) {
    $bundle .= '.' . $view_mode;
  }

  if (!panelizer_administer_entity_bundle($handler, $bundle)) {
    return FALSE;
  }

  return $handler->has_default_panel($bundle) && !$handler->has_panel_choice($bundle);
}

This is the access callback for settings, context, layout, and content.

You CAN have a choice and a default (that means that the default is the one chosen at the beginning but can be later changed). However, the menu locations are different if there is a choice, since we have to add list management.

I've fixed the duplicate tabs, some of which were invalid. I think that was the problem here.

In case it helps someone who arrives here in the future: I ran into the above error today, but it couldn't be the same bug since this was fixed a long time ago.

I was trying to enable panelizer for the 'event' bundle and wanted to access http://example.dev/admin/structure/panelizer/node/event.page_manager/set.... As it turned out, during development a variable called panelizer_node:event:page_manager_selection had already been set to 0. I don't know why or when that happened, but it did. This variable is retrieved and checked (if === FALSE) in PanelizerEntityDefault::get_default_display_name() which is called indirectly by the page's access callback panelizer_has_no_choice_callback(). Obviously the integer 0 is not identical to the boolean FALSE, so the access was denied. A simple drush vdel panelizer_node:event:page_manager_selection solved my problem.

@marcvangend: Please open a new issue so your scenario can be looked into. Thanks.

I have created a new issue for this here: https://www.drupal.org/node/2421321

I tried the above solution of removing the variable but it didn't work for me.