VS2017 Entity Framework Failed to retrieve data for this request

Question

When trying to add a new EF Connection to a SQL Server I get this exception:

Failed to retrieve data for this request. Method not found: 'Void Microsoft.SqlServer.Management.Sdk.Sfc.EnumResult.set_CommandElapsedTime(System.TimeSpan)

Facts:

• "Test Connection" works fine
• It does not matter which database I try to connect (tried different sources, on premises and SQL Azure)
• It used to work before
• Reinstalling EF SDK did not help
• The error message appears immediately after clicking "OK" (no delay)

Does anybody have an idea how to fix this?

Answer 1

Re-install VS2017 solving the problem!

Answer 2

I had the same problem. Installing Microsoft SQL Server Data Tools (SSDT) Fixed it for me

Download it here