Unable to compile generated http client after setting generateNullableReferenceTypes to true

[srgoapp]

When setting generateNullableReferenceTypes to true, the following compile errors occur.

     C:\riderprojects\Eltilmelding\TestCommon\obj\swaggerClient.cs(17411,30): error CS8765: Nullability of type of parameter 'value' doesn't match overridden member (possibly because of nullability attributes).
     C:\riderprojects\Eltilmelding\TestCommon\obj\swaggerClient.cs(17458,32): error CS8765: Nullability of type of parameter 'existingValue' doesn't match overridden member (possibly because of nullability attributes).
     C:\riderprojects\Eltilmelding\TestCommon\obj\swaggerClient.cs(17466,56): error CS8604: Possible null reference argument for parameter 'discriminator' in 'Type JsonInheritanceConverter.GetObjectSubtype(Type objectType, string discriminator)'.

The problems seems to be that the generated class JsonInheritanceConverter that derive from Newtonsoft.Json.JsonConverter does not match the method signature for override methods.