Undefined index title, and fatal error when combined with Metatag 7.x-1.17

Having the same issue

I just got these errors as well in case it helps debugging (also caused me a fatal error and work lost)

Recoverable fatal error: Argument 2 passed to metatag_filter_values_from_defaults() must be of the type array, null given, called in /var/www/html/dev/net/sites/all/modules/seo_ui/seo_ui.module on line 246 and defined in metatag_filter_values_from_defaults() (line 1901 of /var/www/html/dev/net/sites/all/modules/metatag/metatag.module).

Notice: Undefined index: #metatag_defaults in _seo_ui_alter_metatags_submit() (line 242 of /var/www/html/dev/net/sites/all/modules/seo_ui/seo_ui.module)

Notice: Undefined index: token_group in _seo_ui_alter_metatags() (line 186 of /var/www/net/sites/all/modules/seo_ui/seo_ui.module).
Notice: Undefined index: title in _seo_ui_alter_metatags() (line 210 of /var/www/net/sites/all/modules/seo_ui/seo_ui.module).
Notice: Undefined index: value in _seo_ui_fix_metatag_descriptions() (line 232 of /var/www/net/sites/all/modules/seo_ui/seo_ui.module).

fixed bug (only for seo_ui)
in new versions of metatag we have language

Patch #5 it works for me, (drupal-7.32, metatag-7.x-1.4 seo-ui-7.x-1.0, multilanguage site)

Hi - i'm using version Metatag 7.x-1.4 and still get the error:

Notice: Undefined index: value in _seo_ui_fix_metatag_descriptions() (line 227 ...

I've made a small amendment to the patch to fix this

When there's patch mark issue - needs review

updating title.
I'm getting this issue with 7.x-1.17
Notice: Undefined index: title in _seo_ui_alter_metatags() (line 213 of ../docroot/sites/all/modules/contrib/seo_ui/seo_ui.module).

After applying the patch above. The issue at node/add/ page got solved but it was showing the error in _seo_ui_alter_metatags_submit
Working on its fix

Here's teh patch that fixed my issue in #9

Patch in #10 was giving following error while adding translations to the node.

Recoverable fatal error: Argument 2 passed to metatag_filter_values_from_defaults() must be of the type array, null given, called in seo_ui.module on line 249

So, here is the updated patch.

#11 seems good

I still have an issue when I create a new translated node (using field translations).
The HTML Page Title Settings field group is empty.

$form_state['node']->language returns und, so these lines doesn't work :

        // Traverse the metatags form array and alter the descriptions
        // to link back to metatags module default settings.
        _seo_ui_fix_metatag_descriptions($form['metatags'][$form_state['node']->language], $link);
// [...]
      // Assign the metatags title to our new metatags_title fieldset
      $form['seo_vtab']['metatags_title']['title'] = $form['metatags'][$form_state['node']->language]['basic']['title'];

      // Unset the metatags form title from it's original location
      unset($form['seo_vtab']['metatags'][$form_state['node']->language]['basic']['title']);

I guess it would be better to use something like that :

        $lang = $form['metatags']['#language'];
        _seo_ui_fix_metatag_descriptions($form['metatags'][$lang], $link);

Tested with Metatags v1.25

Updated the patch for the latest development version.
Priority downgrade, since its only a notice ;)