Could not get unknown property 'flutter' for extension 'android' of type com.android.build.gradle.LibraryExtension.

[zladnrms]

Before creating an issue, make sure that you are on the latest file_picker version and that there aren't already any similar opened inssues. Also, check if it isn't described on the Wiki, specially on Troubleshooting page.

Also, sometimes a simple flutter clean and flutter build again with latest file_picker version, may end up by fixing cached issues, so I encourage you to first do so.

Describe the bug
A clear and concise description of what the bug is. If the issue happens to be on Android, please make sure that it also happens with a different device/simulator and/or version.

Platform

• [O] Android
• iOS
• Web
• Desktop

Platform OS version
Android

How are you picking?

==================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':file_picker'.
> Failed to notify project evaluation listener.
   > Cannot invoke method substring() on null object
   > Android Gradle Plugin: project ':file_picker' does not specify `compileSdk` in build.gradle (/Users/..../.pub-cache/hosted/pub.dev/file_picker-10.3.6/android/build.gradle).

i think maybe occured by compileSdk flutter.compileSdkVersion in android/build.gradle.

Details to reproduce the issue
Provide all the details to reproduce the issue.

Error Log
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Screenshots and/or video
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Flutter Version details
Please, post the output of your flutter doctor -v, preferably, while running the issued device/simulator.

Additional context
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[zladnrms]

@miguelpruivo

[daniJimen]

@zladnrms you are in old version, could you do a flutter clean and update to 10.3.8? cloud be a great point to see your flutter doctor -v to analice your flutter version and another information