Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15

Using Flutter, it was fixed by:

- Updating Android Studio packages, specially the Kotlin plugin.
- Get the last Kotlin plugin version Nbr from [Gradle - Plugin and versions][1]. For now it's 1.6.10.
- Update *<Your_project_name_folder>\android\build.gradle* file by replacing the old Kotlin version by the new one you got from the web site above.

`ext.kotlin_version = '<The_new_version_Nbr>'` _in my case `ext.kotlin_version = '1.6.10'`_
- Restart Visual Studio Code.

You're done.

[1]:

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I had this problem in a Flutter project.

In my case, a line for *kotlin-gradle-plugin* was missing in the Android *build.gradle* file, so adding `ext.kotlin_version = '1.6.10'` didn’t fix it.

After adding

`classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"`

the error was gone.

Full code section:

buildscript {
ext.kotlin_version = '1.6.10'
repositories {
google()
mavenCentral()
}

dependencies {
classpath 'com.android.tools.build:gradle:4.1.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}

Just go to file *build.gradle* (Project: yourProjectName).

**Change**

```lang-none
plugins {
...

id 'org.jetbrains.kotlin.android' version '1.5.x' apply false

...
}
```

(1.5.x means x version number at your case, such as 1.5.1.)

**To**

```lang-none
plugins {
...

id 'org.jetbrains.kotlin.android' version '1.7.10' apply false

...
}
```

It works in my case...

I have faced this error in [IntelliJ IDEA][1] with a Maven project.
The solution is about to turn off Kotlin plugin in IntelliJ IDEA if you are not using Kotlin in your project.

Go to:

Menu *File* → *Settings* → *Plugins*

And turn off the Kotlin plugin by click on the checkbox. See here:

[![Enter image description here][2]][2]


[1]:

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[2]:

I have the set minsdk 24 and restart the Android Studio, its working fine.

in my case for

> The binary version of its metadata is 1.7.1, expected version is 1.5.1


got to (dependencies) inside build.gradle(project) convert from `1.5.x` (x) in my case is (20)


classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.20"

to `1.7.10`

classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.10"

project build.gradle:

ext.kotlin_version = '1.6.10'

app/build.gradle:

dependencies {
// classpath 'com.android.tools.build:gradle:7.1.2'
// classpath "org.jetbrains.kotlin:kotlin-gradle- plugin:$kotlin_version"
}




But after changes ext.kotlin_version to lower this warning stay but the red warning is gone


[![enter image description here][1]][1]


[1]:

Changed the Project build gradle to

buildscript {
ext.kotlin_version = '1.7.20'
repositories {
google()
mavenCentral()
}

dependencies {
classpath 'com.android.tools.build:gradle:7.2.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}

This works for me

buildscript {
ext.kotlin_version = '1.7.20'
repositories {
google()
mavenCentral()
}

dependencies {
classpath 'com.android.tools.build:gradle:7.2.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}

Although this question has been answered, I think it's worth explaining what is happening
---------
For the example:

The binary version of its metadata is 1.7.1, expected version is 1.5.1.

The `expected` version is the Kotlin for `kotlin-gradle-plugin`

The `binary` version is the what is downloaded (or previously compiled)
for `com.android.tools.build:gradle`

**<project_dir>/android/build.gradle**

buildscript {
ext.kotlin_version = '1.5.20' // <= expected version is 1.5.1
}
dependencies {
classpath 'com.android.tools.build:gradle:7.3.1' // downloads 1.7.1 Metadata
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" // <= 1.5.20 used here

Why is this Happening So Much?
-------
1. The user updates the Kotlin version of the plugin to match the IDE version per the warning.

[![Warning from Android Studio to match Kotlin Versions][1]][1]


2. The user updates the android build tools gradle plugin per the warning

[![Warning about android build tools][2]][2]

***This is the WRONG version!***

Now you don't have any warnings, but the version suggested is `7.1.3` which is not the latest. (I don't know why it suggests this older version) `7.3.1` is currently the latest and is meta data `1.7.1`, so it will match the Kotlin version of `1.7.20` (which is also metadata `1.7.1`)

What else could be wrong?
-----
Due to caching, gradle may be using an older dependency before you updated. To start clean:
1. delete the ~/.gradle/cache directory
2. delete the android/.gradle directory
3. delete the project_dir/build dir
4. ensure the `android/gradle/gradle-wrapper.properies` has the correct `distributionUrl` (currently `distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip`)
5. from project_dir do `flutter build apk`

NOTE: your dependencies may need to be updated if their `com.android.tools.build:gradle` version is too old. Alternatively, both the kotlin and `tools:gradle` versions can be downgraded to compatible version that match metadata (although Android Studio will warn for that not matching the IDE Kotlin version)

How to Prevent this from happening Again?
-----

* Use the same Kotlin version as the IDE normally for `ext.kotlin_version`. see

[To see links please register here]

* Double check the `com.android.tools.build:gradle` version. See

[To see links please register here]

and

[To see links please register here]

[1]:

[2]: