我正在尝试使用Android Room 2.3.0，目前出现以下编译错误：
ProjectDao：

error: Not sure how to handle query method's return type (java.lang.Object). DELETE query methods must either return void or int (the number of deleted rows).
    public abstract java.lang.Object deleteAllProjects(@org.jetbrains.annotations.NotNull()
error: Query method parameters should either be a type that can be converted into a database column or a List / Array that contains such type. You can consider adding a Type Adapter for this.
    kotlin.coroutines.Continuation<? super kotlin.Unit> continuation);
error: Unused parameter: continuation
    public abstract java.lang.Object deleteAllProjects(@org.jetbrains.annotations.NotNull()
error: Type of the parameter must be a class annotated with @Entity or a collection/array of it.
    kotlin.coroutines.Continuation<? super java.lang.Long> continuation);
error: Not sure how to handle insert method's return type.
    public abstract java.lang.Object insertProject(@org.jetbrains.annotations.NotNull()
error: Not sure how to handle delete method's return type. Currently the supported return types are void, int or Int.
    public abstract java.lang.Object deleteProject(@org.jetbrains.annotations.NotNull()
error: Type of the parameter must be a class annotated with @Entity or a collection/array of it.
    kotlin.coroutines.Continuation<? super kotlin.Unit> continuation);

反刀：

Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction
   > java.lang.reflect.InvocationTargetException (no error message)

但是，我的ProjectDao.kt文件有以下内容：

@Dao
interface ProjectDao {
    @Query("SELECT * FROM table_projects")
    fun getAll(): List<Project>

    @Insert
    suspend fun insertProject(project: Project): Long

    @Insert
    fun insertProjects(projects: List<Project>)

    @Delete
    suspend fun deleteProject(project: Project)

    @Query("DELETE FROM table_projects")
    suspend fun deleteAllProjects()

    @Transaction
    @Query("SELECT * FROM table_projects")
    fun getAllProjectsWithCounters(): List<ProjectWithCounters>

    @Transaction
    @Query("SELECT * FROM table_projects WHERE id_project=:projectID")
    fun getProjectWithCounters(projectID: Long): ProjectWithCounters
}

我以前没有遇到过任何问题，突然之间我得到了这些错误，我不知道是什么导致了它们。
谢谢！