Goal:
Use EF 6 inside of ASP.net core 3 by using a project named ef.
Project EF is the main connection to the database sql server.
Problem:
I get an error saying
Error = Unable to evaluate the expression. Operation not supported. Unknown error: 0x80070057.
What part am I missing from the code in order retrieve the data in asp.net core 3.
Info:
*Uploaded the project at github (https://github.com/candyboyyy/WebApplication1_asp.netcore3)
*Using VS 2019, EF 6, asp.net core 3

CREATE TABLE [dbo].[Blogs]
(
[BlogId] [INT] IDENTITY(1,1) NOT NULL,
[Name] [NVARCHAR](200) NULL,
[Url] [NVARCHAR](200) NULL,
CONSTRAINT [PK_dbo.Blogs]
PRIMARY KEY CLUSTERED ([BlogId] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF,
IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO