When encountering the error message “Some Kotlin libraries attached to this project were compiled with a newer Kotlin compiler,” it means that the Kotlin code in your project depends on external libraries that were compiled using a more recent version of the Kotlin compiler than the one you are currently using.
To resolve this issue, you have a few options:
-
Update your project’s Kotlin version: You can try updating your project’s Kotlin version to match the version used by the libraries causing the issue. This can be done by modifying the Kotlin version in your project’s build.gradle file. For example:
buildscript { ext.kotlin_version = "1.5.20" // other configurations }
Make sure to sync your Gradle files after making this change.
- Check library compatibility: If updating your Kotlin version is not feasible or does not solve the problem, you can check if the library you are using has a compatibility matrix or release notes which specify the minimum required Kotlin version. It is possible that you are using a library version that requires a higher Kotlin version than you are currently using. In this case, you can either try downgrading the library to a compatible version or consider finding an alternative library that is compatible with your current Kotlin version.
- Contact library maintainers: If none of the above options work, you can reach out to the maintainers of the library causing the issue and inquire about their plans to support older Kotlin versions. They may be able to provide guidance or suggest workarounds.