EF Core+ Code First迁移时报错，会是什么问题呢？

使用`dotnet ef migrations add InitialCreate`迁移时报错，如下：

Build started...
Build succeeded.
System.MissingMethodException: Method not found: 'Void Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator..ctor(Microsoft.EntityFrameworkCore.Migrations.IMigrationsAssembly, Microsoft.EntityFrameworkCore.Migrations.IHistoryRepository, Microsoft.EntityFrameworkCore.Storage.IDatabaseCreator, Microsoft.EntityFrameworkCore.Migrations.IMigrationsSqlGenerator, Microsoft.EntityFrameworkCore.Storage.IRawSqlCommandBuilder, Microsoft.EntityFrameworkCore.Migrations.IMigrationCommandExecutor, Microsoft.EntityFrameworkCore.Storage.IRelationalConnection, Microsoft.EntityFrameworkCore.Storage.ISqlGenerationHelper, Microsoft.EntityFrameworkCore.Infrastructure.ICurrentDbContext, Microsoft.EntityFrameworkCore.Infrastructure.IModelRuntimeInitializer, Microsoft.EntityFrameworkCore.Diagnostics.IDiagnosticsLogger`1, Microsoft.EntityFrameworkCore.Diagnostics.IRelationalCommandDiagnosticsLogger, Microsoft.EntityFrameworkCore.Storage.IDatabaseProvider)'.
at ShardingCore.EFCores.ShardingMigrator..ctor(IShardingRuntimeContext shardingRuntimeContext, IMigrationsAssembly migrationsAssembly, IHistoryRepository historyRepository, IDatabaseCreator databaseCreator, IMigrationsSqlGenerator migrationsSqlGenerator, IRawSqlCommandBuilder rawSqlCommandBuilder, IMigrationCommandExecutor migrationCommandExecutor, IRelationalConnection connection, ISqlGenerationHelper sqlGenerationHelper, ICurrentDbContext currentContext, IModelRuntimeInitializer modelRuntimeInitializer, IDiagnosticsLogger`1 logger, IRelationalCommandDiagnosticsLogger commandLogger, IDatabaseProvider databaseProvider)
......

会是什么问题呢？