[Android 9 ][Xiaomi Mi A1]Crash open url

[neestell]

App stops when I try to open and close url https://chequeado.com/cuatro-cosas-que-debes-tener-en-cuenta-si-sos-fact-checker-y-ensenas-en-una-escuela-secundaria/
Process: io.app.android, PID: 2450 java.lang.RuntimeException: Unable to start activity ComponentInfo{io.app.android/com.pichillilorenzo.flutter_inappbrowser.ChromeCustomTabs.ChromeCustomTabsActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void io.flutter.plugin.common.MethodChannel.invokeMethod(java.lang.String, java.lang.Object)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2925) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3060) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1818) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6762) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void io.flutter.plugin.common.MethodChannel.invokeMethod(java.lang.String, java.lang.Object)' on a null object reference at com.pichillilorenzo.flutter_inappbrowser.ChromeCustomTabs.ChromeCustomTabsActivity.onCreate(ChromeCustomTabsActivity.java:52) at android.app.Activity.performCreate(Activity.java:7136) at android.app.Activity.performCreate(Activity.java:7127) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2905) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3060)  at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1818)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:193) 

[neestell]

Fixed locally. I validate url before open it