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There are two ways to solve it if you are in an older version of flutter other than the last one (1.20) 

flutter_svg Error: Type 'DiagnosticableMixin' not found

I solved this issue by adding these code:

hope this help 😁 Environment
Flutter version: 1.10.15
Plugin version:    ^2.1.0+1
Android version:    9
iOS version:
Xcode version:
Device information: 
Description
I use demo to load url

flutter_inappwebview [InAppWebview]: window.flutter_inappwebview.callHandler is not a function

@fritz-playmaker have you tried updating you project to fully support AndroidX (API 28)? Here are the steps necessary to accomplish this:

Add the following to your gradle.properties file:




Make sure you set the compileSdkVersion in your android/app/build.gradle file to 28:




Make sure you replace all the android

flutter permission handler Error: failed linking references during Android Build

No there is not but the basics are as follows:



old way
new way




await PermissionHandler() .checkPermissionStatus(PermissionGroup.camera)
await PermissionGroup.camera.status


(await PermissionHandler() .requestPermissions([PermissionGroup.camera]))[PermissionGroup.camera]
await PermissionGroup.camera.request()


await PermissionHandler() .requestPermissions([PermissionGroup.camera

flutter permission handler Make API more intuitive

@mees-brenzie
v3.0.0 update is definitely a big one I will be writing a proper guide for it to explain some stuff 

table_calendar Multiple Initial Dates

I've got similar problem The unity app run the first time i launch the screen if I navigate back and reopen the app crashes 

flutter unity view widget Closing unity screen and relaunching it crashes the app

It might not be your case but when opening the app from the notification you need to check with the plugin if a notification opened the app 

flutter_local_notifications onSelectNotification code not being called when a notification is tapped and the application is not running

I solved the problem with this code. On ios: the provided shouldOverrideUrlLoading callback is never called 