ASP.Net Core Entity Framework Error: Data may have been modified or deleted since entities were loaded

Greetings Sir,

There are so much hype on Net core yet to host it is a problem. After hours of searching about hosting .net core on Plesk 

I deployed a sample app with no DB context Context and it ran successfully, but when I add DB context it will start showing the default error page. I don't know what else to do prior to this problem.

Database operation expected to affect 1 row(s) but actually affected 0 row(s). Data may have been modified or deleted since entities were loaded

Var findId = context.Customer.FindAsync(Id)
Context.Remove
Context.Save

Is running well on my local PC (Deleting the associated Customer Id.  But on the production server is a problem.