Still i got this Efcore internal classes problem

[tabakhian]

MissingMethodException: Method not found: 'Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder Microsoft.EntityFrameworkCore.Metadata.Internal.InternalModelBuilder.Entity(System.Type, Microsoft.EntityFrameworkCore.Metadata.Internal.ConfigurationSource)'.

[crhairr]

Could you please provide a little more detail? If you're trying to use this provider with EF Core 3.x, that is currently unsupported.