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Is that how it should be?)

Screenshot

When any resistance is added to the circuit, the error increases and each added resistance must be reduced by one ohm) And a buffer without resistance cannot be used at all) This is in all versions of the app)

From an image it is difficult to say.
Can you share your circuit?

File)

Uploaded files:

Thanks.

I don't see the problem.
What result do you expect that is different from what you get?