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Why am I getting the error “String reference not set to an instance of a String. Parameter name: s”?

April 26, 2017Error instance parameter Reference String

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Why am I getting the error “String reference not set to an instance of a String. Parameter name: s”?

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This is almost always due to bad data being passed into JSON.Deserialize(). This method relies on Microsoft’s DataContractJsonSerializer, which does not accept a null value as the target of deserialization. Ensure that you’re not passing null as the value to deserialize.