400 Error in group chat

Please help me am getting below error in group chat

error code=“400” type=“modify”><bad-request xmlns=“urn:ietf:params:xml:ns:xmpp-stanzas”
to=“madhu@localhost/converse.js-70051639”
from=“qq@conference.localhost”

As we told you in the group chat, you shouldn’t be using localhost as a name for your server. Even if you test this on your localhost PC.