Sending SMS fails

Sending any SMS fails like on 0.4.0~beta2-1pureos2

Sep 07 20:04:45 nn chatty[3308]: mm_chat_send_message_from_queue: assertion 'g_list_model_get_n_items (users) > 0' failed

@mohammed.sadiq @evangelos.tzaras am i missing something since i'm sure you tested that before uploading?

EDIT: i should add that the send icon goes away when pressing it.