Webserver not working

Hello everyone,

I was using webserver to view webpage in my app. But it is working properly in my phone. but in my brother's phone, it is showing blank.

Redmi Note 9, MIUI Global, 12.0.7, 12.0.7.0(QJOINXM)
Android Version- 10 QP1A.190711.020
MODEL - M2003J15SI
BASEBAND VERSION - MOLY.LR12A.R3.MP.V98.P80

Please show your relevant blocks