Transfer File in IOS using XMPP Framework with Different network

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XMPP

iOS

Hello Everyone,

I am working on IOS Application for Instant messaging and File transferring like whatspp. I am using the File Transfer demo from GITHUB.

https://github.com/nplexity/xmpp-file-transfer-demo[^]

in this demo i can transfer the file between two IOS Devices in the same network. But it stops transferring file and and provide the error

"Invalid host parameter (nil or ""). Should be a domain name or IP address string." UserInfo=0x170263400 {NSLocalizedDescription=Invalid host parameter (nil or ""). Should be a domain name or IP address string.}

I am not able to understand how to solve this issue. I have tried most of google ans but none of them work.

Thank in advance