Cause: invalid type code: 1C

Please report at https://youtrack.jetbrains.com/newIssue?project=IDEA with the sample project and the logs (https://intellij-support.jetbrains.com/hc/articles/207241085). See https://youtrack.jetbrains.com/issue/IDEA-222226 for the similar issue.

Please how do I resolve Gradle sync failed: Cause: invalid type code: 1C

@... The answer is still actual as there are no steps to reproduce, sample project, and logs. Please report at https://youtrack.jetbrains.com/newIssue?project=IDEA with the sample project and the logs (https://intellij-support.jetbrains.com/hc/articles/207241085).

This is because of using a very recent version of Java JDK(version 14).

To fix this problem go to File->Project Structure->JDK->Choose the EnbeddedJDK option.

More info here.