if (sizzle(`presence-subscription-required[xmlns="${Strophe.NS.PUBSUB_ERROR}"]`, e.iq).length) {
err_msgs.push(__("Sorry, we're unable to send an encrypted message because %1$s " + "requires you to be subscribed to their presence in order to see their OMEMO information", e.iq.getAttribute('from')));
} else if (sizzle(`remote-server-not-found[xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"]`, e.iq).length) {
err_msgs.push(__("Sorry, we're unable to send an encrypted message because the remote server for %1$s could not be found", e.iq.getAttribute('from')));
} else {
err_msgs.push(__("Unable to send an encrypted message due to an unexpected error."));