I developed a iOS App, this App need to visit a local url. It can visit the url on iPhone 13 (iOS 15.4) and iPhone 14 Plus (iOS 16.5.1), but it can not visit the same url on iPhone 6s（iOS 15.8.1). The error message is 'NSURLErrorDomain Code=-1009'. 1). The url can be visited by Safari on iPhone 6s, so the network of iPhone 6s is fine. 2). The Local Network has enabled in the APP settings. 3). I notice that in iPhone Settings -> WLAN -> Apps Using WLAN & Cellular, my App information can be found on iPhone 13 and iPhone 14 Plus, and can not find my App information on iPhone 6s. How should I troubleshoot this issue? Thanks you! Follows are full error message. 2024-02-08 17:49:39.706240+0800 AstroeyeWiFi[1186:114419] Task .<8> finished with error [-1009] Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." UserInfo={_kCFStreamErrorCodeKey=50, NSUnderlyingError=0x280715c20 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 "(null)" UserInfo={_NSURLErrorNWPathKey=unsatisfied (Denied over Wi-Fi interface), interface: en0, _kCFStreamErrorCodeKey=50, _kCFStreamErrorDomainKey=1}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask .<8>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask .<8>" ), NSLocalizedDescription=The Internet connection appears to be offline., NSErrorFailingURLStringKey=http://192.168.0.1:50628/form/getDeviceId, NSErrorFailingURLKey=http://192.168.0.1:50628/form/getDeviceId, _kCFStreamErrorDomainKey=1} [DNO][getDeviceSysId][Error] underlying(Alamofire.AFError.sessionTaskFailed(error: Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." UserInfo={_kCFStreamErrorCodeKey=50, NSUnderlyingError=0x280715c20 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 "(null)" UserInfo={_NSURLErrorNWPathKey=unsatisfied (Denied over Wi-Fi interface), interface: en0, _kCFStreamErrorCodeKey=50, _kCFStreamErrorDomainKey=1}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask .<8>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask .<8>" ), NSLocalizedDescription=The Internet connection appears to be offline., NSErrorFailingURLStringKey=http://192.168.0.1:50628/form/getDeviceId, NSErrorFailingURLKey=http://192.168.0.1:50628/form/getDeviceId, _kCFStreamErrorDomainKey=1}), nil)

I built an app and sent it to my colleagues. The app works on my iPhone 13 and iPhone 6s, but not on my colleague's iPhone 7. I got the ips file and tried to analyze it using dwarfdump and xcrun. But can't get any useful information. attached is ips file. How can I find out where the problem is？ SuperCam-2022-01-20-085453.ips.txt