iOS inappbrowser return bad request

Ionic Framework ionic-v3
#1

on Xcode log says below.

[NetworkInfo] Signal strength query returned error: Error Domain=NSPOSIXErrorDomain Code=13 “Permission denied”, descriptor: <CTServiceDescriptor 0x282250ee0, domain=1, instance=1>

on home.ts

const browser = this.inapp.create(“http://www.xxx.or.kr/home/m” ,’_self’, options);

it return with below error on browser
your browser sent a request that this server could not understand

what would be the problem?

#2