Thanks for the reply but i am not developing my app via Xcode as I mentioned above. I am using Rider 2026.1.2 and debug or release mode process success but when run/deploy to the simulator app crashing :/ i couldn't find where is the mistake or bug xcode, rider, simulator... PS : app running with android emulator w/o error also apk test on physical device

This is unrelated to WKWebView and to the JavaScript-injection issue we were discussing. The app isn't reaching any code that uses WKWebView. yes i know but when its occured wanted to share with you For a launch crash like this, the fastest progress is usually a report to the .NET MAUI / Xamarin issue tracker, what is your suggestion? should i I clean install Rider macOS 26.1.2 (latest and simulator problem solved version) and Xcode & emulators? Run your Xcode 26 / iOS 26 SDK build on the iPhone 13 connected via USB. In Safari on the Mac, choose Develop → [Your iPhone] → [the entry for the WKWebView inside your app]. The entry will be labeled with your app's name or with the URL the WKWebView is currently showing — not "Safari", which is a separate process. With the JavaScript console open, trigger the operation in your app that's failing. The errors (or silence) on the console will tell us which of the four scenarios from my previous message you're in. The test you described in NOTE-1 was the page loaded directly in Safari on iPhone, which is a different process from your app's WKWebView and doesn't go through any of the EvaluateJavaScriptAsync paths. Attaching Web Inspector to the WKWebView inside your running app is the test that will give us the diagnostic information we need. Yes I know and as I said before which mentioned NOTE-1 i tried to run and everything was fine main is problem is when run it under webview hope to explain clearly and we will find the solution both of for device deploy and webview problem regards

Thanks for the reply but when deploy to the simulator its crashing so that i can't test anything ( my setup is macOS 26, xCode 26.4.1, 26.5 simulators, macOS Rider 26.1.2 ) here ise crash report Translated Report (Full Report Below) Process: XsentiusMaui [37730] Path: /Users/USER/Library/Developer/CoreSimulator/Devices/F24D336A-217A-4B3C-9D86-B11FF5A3C57C/data/Containers/Bundle/Application/054985D3-AA75-4CCE-A103-35EC0BE523B0/XsentiusMaui.app/XsentiusMaui Identifier: com.cozbim.xsentiusmobile Version: 1.0.1 (101) Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd_sim [37350] Coalition: com.apple.CoreSimulator.SimDevice.F24D336A-217A-4B3C-9D86-B11FF5A3C57C [7708] Responsible Process: SimulatorTrampoline [1010] User ID: 501 Date/Time: 2026-05-19 20:09:33.7484 +0300 Launch Time: 2026-05-19 20:09:33.6347 +0300 Hardware Model: Mac16,1 OS Version: macOS 26.5 (25F71) Release Type: User Crash Reporter Key: 307E060A-0B57-9A0D-D769-4CCF07BED703 Incident Identifier: DDDD5089-C8EA-4AD0-BD3B-539845EBA70D Sleep/Wake UUID: 9513F2DA-21DC-45FA-AD7A-E168F1211B79 Time Awake Since Boot: 77000 seconds Time Since Wake: 3520 seconds System Integrity Protection: enabled Triggered by Thread: 0 Exception Type: EXC_BAD_ACCESS (SIGKILL (Code Signature Invalid)) Exception Subtype: UNKNOWN_0x32 at 0x00000001014c4000 Exception Codes: 0x0000000000000032, 0x00000001014c4000 Termination Reason: Namespace CODESIGNING, Code 2, Invalid Page VM Region Info: 0x1014c4000 is in 0x1014c4000-0x101564000; bytes after start: 0 bytes before end: 655359 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL mapped file 1014a4000-1014c4000 [ 128K] r--/rwx SM=COW Object_id=c68cd9f9 ---> mapped file 1014c4000-101564000 [ 640K] r--/rwx SM=COW Object_id=580d2308 GAP OF 0x2d4000 BYTES mapped file 101838000-101aec000 [ 2768K] r-x/rwx SM=COW Object_id=e9bd83c8 Thread 0 Crashed: 0 dyld_sim 0x1011be980 mach_o::UnsafeHeader::forEachLoadCommand(void (load_command const*, bool&) block_pointer) const + 44 1 dyld_sim 0x1011c1460 mach_o::UnsafeHeader::forEachSegment(void ....

NOTE-3 : The same IPA compiled with Xcode 16.4 / iOS 18.x works correctly on the same iPhone 13 device NOTE-4 : iOS 26.4.1 beta, iOS 26.5 beta, Xcode 26.x EAP, Rider macOS 2026.1.1 (not listing iOS device list ) & 2026.1.1 EAP (listed iOS device list)