Plugin [id: 'org.jetbrains.kotlin.jvm', version: '1.2.71'] was not found in any of the following sources

1. Check your Internet connection: Make sure you have an active internet connection and your internet is not restricted. You can try disabling any proxy settings or VPNs and see if that resolves the issue.


Code:

Check your Internet connection and make sure your Internet is not restricted.



2. Use a VPN: If you are behind a firewall or have restricted internet access, using a VPN (Virtual Private Network) can help you bypass these restrictions and access the necessary resources.


Code:

I solved this problem by turning on proxy for all tunnels (not just HTTP) with a VPN app.



3. Check CA-certs cache: In some cases, the issue may be caused by an outdated or corrupted CA-certs cache. You can try clearing the cache by running the following commands in a terminal:


Code:

sudo su
/usr/bin/printf '\xfe\xed\xfe\xed\x00\x00\x00\x02\x00\x00\x00\x00\xe2\x68\x6e\x45\xfb\x43\xdf\xa4\xd9\x92\xdd\x41\xce\xb6\xb2\x1c\x63\x30\xd7\x92' > /etc/ssl/certs/java/cacerts
/var/lib/dpkg/info/ca-certificates-java.postinst configure



4. Disable Gradle's offline mode: If you have accidentally enabled Gradle's offline mode, it can prevent it from accessing the internet to download necessary dependencies. Make sure to disable this mode in the Gradle settings.


Code:

To disable it simply go to Settings > Build, Execution, Deployment > Build Tools > Gradle and deselect the "Offline work" checkbox.



5. Check your firewall settings: Ensure that your firewall is not blocking the necessary ports required for Gradle to access the internet. You can temporarily disable the firewall to see if that resolves the issue.


6. Update Gradle and Kotlin versions: Make sure you are using the latest stable versions of Gradle and Kotlin. Sometimes, outdated versions can cause compatibility issues.


7. Check for Proxy/VPN interference: If you are using a proxy or VPN, try disabling them temporarily to see if that resolves the issue. Some proxies or VPNs may interfere with Gradle's internet access.


8. Clear Gradle cache: Sometimes, a corrupted Gradle cache can cause issues. Try clearing the cache by deleting the ".gradle" directory in your user home directory.


9. Restart Android Studio: If you are using Android Studio, try restarting it. This can sometimes resolve temporary glitches or issues.


10. Reinstall Gradle: If none of the above solutions work, you may need to reinstall Gradle. Make sure to follow the official documentation for your platform.


11. Update Kotlin version in build.gradle: Ensure that the Kotlin version specified in your build.gradle file matches the version of the Kotlin plugin you are using. Sometimes, mismatched versions can cause issues.


Code:

plugins {
    id 'org.jetbrains.kotlin.jvm' version '1.8.21' apply false
}



12. Check your proxy settings in Android Studio: If you are using Android Studio, ensure that the proxy settings are configured correctly. Go to "Settings > Appearance & Behavior > System Settings > HTTP Proxy" and check if the proxy settings are appropriate.


13. Disable Charles Proxy: If you are using Charles Proxy for debugging network traffic, try disabling it temporarily to see if that resolves the issue. Charles Proxy can sometimes interfere with Gradle's internet access.


14. Upgrade Kotlin plugin version: Update your Kotlin plugin version to the latest stable release in the build.gradle project file.


Code:

id 'org.jetbrains.kotlin.android' version '1.9.22' apply false



15. Use the correct repository URL: Ensure that you are using the correct repository URL for the Kotlin plugin in your build.gradle file. The default repository URL is "https://plugins.gradle.org/m2/".