Errors when adding Contextual Filters to View

I was trying to add Block View with a Contextual Filter "Content: Has taxonomy term ID" and I keep getting the following errors:

Notice: Undefined index: arg_id in options_form() (line 31 of .../drupal/sites/all/modules/views_geojson/views/views_plugin_argument_default_bboxquery.inc). =>

    ... (Array, 14 elements)
        13: views_plugin_argument_default_bboxquery->options_form() (Array, 2 elements)
        12: views_handler_argument->default_argument_form() (Array, 2 elements)
        11: views_handler_argument->options_form() (Array, 2 elements)
        10: views_handler_argument_many_to_one->options_form() (Array, 2 elements)
         9: views_handler_argument_term_node_tid->options_form() (Array, 2 elements)
         8: views_ui_config_item_form() (Array, 2 elements)
         7: call_user_func_array() (Array, 1 element)
         6: drupal_retrieve_form() (Array, 2 elements)
         5: drupal_build_form() (Array, 2 elements)
         4: views_ajax_form_wrapper() (Array, 2 elements)
         3: views_ui_ajax_form() (Array, 2 elements)
         2: call_user_func_array() (Array, 1 element)
         1: menu_execute_active_handler() (Array, 2 elements)
         0: main() (Array, 2 elements)
    Krumo version 0.2.1a
   Called from .../drupal/sites/all/modules/views_geojson/views/views_plugin_argument_default_bboxquery.inc, line 31  

Note that this particular view has nothing whatsoever to do with Geo-anything.

Arguments don't affect the Live preview and when saved, the block display doesn't show up on the Blocks admin page.

Here is an export of my view in case it helps:

https://gist.github.com/3704581