Android studio

Caused by: org.gradle.internal.metaobject.AbstractDynamicObject$CustomMessageMissingMethodException: Could not find method compileSdk() for arguments [30] on extension 'android' of type com.android.build.gradle.internal.dsl.BaseAppModuleExtension.

报错，咋回事啊，查也查不到，刚加载了个TEACHER给我的文件