Problem with i18n Field submodule

When I visit my Profile2 RegPath page, I get the following error: Notice: Undefined index: #language in i18n_field_field_attach_form() (line 101 of /srv/bindings/00edc18adaf64314934437d31cc78dce/code/sites/all/modules/contrib/i18n/i18n_field/i18n_field.module).

Googling the error gave me no results except for another site displaying the error on their registration page — since their registration page contains the tab "Register as developer," I assume they are also running Profile2 RegPath and that's the root of this problem.

So, this is kind of lame. I know how to get devel to give me a backtrace, but I don't know how to get it in a form that makes it easy to paste here for you. (Sorry, not much of a backend gal). So if this doesn't provide the info you need let me know what I can give you that will be more helpful and I will do that.

• 12: i18n_field_field_attach_form() (Array, 2 elements)
  file (String, 63 characters ) sites/all/modules/contrib/i18n/i18n_field/i18n_field.module:101
  args (Array, 5 elements)
  0 (String, 8 characters ) profile2
  1 (Object) Profile
  2 (Array, 17 elements)
  3 (Array, 15 elements)
  4 (NULL)
• 11: field_attach_form() (Array, 2 elements)
  file (String, 34 characters ) modules/field/field.attach.inc:586
  args (Array, 4 elements)
  0 (String, 8 characters ) profile2
  1 (Object) Profile
  2 (Array, 18 elements)
  3 (Array, 16 elements)
• 10: profile2_attach_form() (Array, 2 elements)
  file (String, 54 characters ) sites/all/modules/contrib/profile2/profile2.module:400
  args (Array, 2 elements)
• 9: profile2_regpath_attach_profile_fields() (Array, 2 elements)
  file (String, 70 characters ) sites/all/modules/contrib/profile2_regpath/profile2_regpath.module:521
  args (Array, 4 elements)
  0 (Array, 40 elements)
  1 (Array, 16 elements)
  2 (String, 18 characters ) user_register_form | (Callback) user_register_form();
  3 (Array, 1 element)
• 8: profile2_regpath_form_alter() (Array, 2 elements)
  file (String, 70 characters ) sites/all/modules/contrib/profile2_regpath/profile2_regpath.module:448
  args (Array, 4 elements)
• 7: drupal_alter() (Array, 2 elements)
  file (String, 24 characters ) includes/module.inc:1101
  args (Array, 4 elements)
• 6: drupal_prepare_form() (Array, 2 elements)
  file (String, 22 characters ) includes/form.inc:1086
  args (Array, 3 elements)
• 5: drupal_build_form() (Array, 2 elements)
  file (String, 21 characters ) includes/form.inc:340
  args (Array, 2 elements)
• 4: drupal_get_form() (Array, 2 elements)
  file (String, 21 characters ) includes/form.inc:131
  args (Array, 1 element)
• 3: _profile2_regpath_user_register() (Array, 2 elements)
  file (String, 67 characters ) sites/all/modules/contrib/profile2_regpath/registration_form.inc:39
  args (Array, 1 element)
• 2: call_user_func_array() (Array, 1 element)
  args (Array, 2 elements)
  0 (String, 31 characters ) _profile2_regpath_user_register | (Callback) _profile2_regpath_user_register();
  1 (Array, 1 element)
• 1: menu_execute_active_handler() (Array, 2 elements)
  file (String, 21 characters ) includes/menu.inc:517
  args (Array, 0 elements)
• 0: main() (Array, 2 elements)
  file (String, 12 characters ) index.php:21
  args (Array, 1 element)

Ugh; I know that's not how you're supposed to do it, sorry.