Getting service unavailable when file transfer file using strophe.si-filetransfer.js and strophe.ibb.js

Openfire Openfire Support
1

I am getting error when file is transferred file using strophe.ibb.js and strophe.si-filetransfer.js.

Here is sending data

http://jabber.org/protocol/ibb

Received result:

http://jabber.org/protocol/ibb

Please suggest me on this concept. please let me know how to resolve this issue