I've added a hidden field to the User Profile page, which I set via script. When saving the form, I get the error,
An invalid form control with name='field_map_y[und][0][value]' is not focusable.
Which from research, seems fair enough, if the field was hidden AND required. But the field is not required, and when I check the field, I can confirm this.
<input type="number" id="edit-field-map-y-und-0-value" name="field_map_y[und][0][value]" value="171" size="12" class="form-text form-number">
When I made the field visible, the form saves successfully. The error only seems to occur in Chrone.
Any ideas on how to enable the form to save with the hidden value?