First, check that your dependency configuration is correct. Make sure that when you update the Kotlin version in the toml file, the relevant plug-ins and dependencies are updated correctly. Second, make sure that your project uses libraries or code structures that are outdated or incompatible with Kotlin 2.0. You need to check all the dependencies in the project to see if you need to update to a version that supports Kotlin 2.0. In addition, it may also be a problem of building the configuration. Check your Gradle configuration file to make sure there are no missing or incorrect configuration items.