JsonException: No parameterless constructor defined for 'Nethereum.Unity.RpcModel.RpcParametersJsonConverter'.

[pabloruiz55]

Hi! I'm experimenting the following issue when building to Android. Note that when running the game on the Unity player everything works fine, but when running on the device (Samsung Galaxy s22+) nothing is. Also, if building it for desktop Windows standalone, it also does work fine.

When trying to read or write from a smart contract (or even just request the block number from the examples) I get the following error:

04-19 09:46:36.921 32219 32274 I Unity   : UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)
04-19 09:46:36.921 32219 32274 I Unity   :
04-19 09:46:36.941 32219 32274 E Unity   : JsonException: No parameterless constructor defined for 'Nethereum.Unity.RpcModel.RpcParametersJsonConverter'.
04-19 09:46:36.941 32219 32274 E Unity   :   at Newtonsoft.Json.Serialization.JsonTypeReflector+<>c__DisplayClass22_0.<GetCreator>b__0 (System.Object[] parameters) [0x00000] in <00000000000000000000000000000000>:0
04-19 09:46:36.941 32219 32274 E Unity   :   at Newtonsoft.Json.Serialization.JsonTypeReflector.GetJsonConverter (System.Object attributeProvider) [0x00000] in <00000000000000000000000000000000>:0
04-19 09:46:36.941 32219 32274 E Unity   :   at Newtonsoft.Json.Serialization.DefaultContractResolver.SetPropertySettingsFromAttributes (Newtonsoft.Json.Serialization.JsonProperty property, System.Object attributeProvider, System.String name, System.Type declaringType, Newtonsoft.Json.MemberSerialization memberSerialization, System.Boolean& allowNonPublicAccess) [0x00000] in <00000000000000000000000000000000>:0
04-19 09:46:36.941 32219 32274 E Unity   :   at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateProperty (System.Reflection.MemberInfo member, Newtonsoft.Json.MemberSerialization memberSerialization) [0x00000] in <00000000000000000000000000000

I've tried the following:

• Using 2021.x / 2022.x / 2023.x unity versions
• Using different versions and packages from the Nethereum releases.
• Using either Tasks or Coroutines.

Any ideas? Thanks in advance.

[eastedgeZack]

Getting the same problem with Unity WebGL

[juanfranblanco]

This is an issue with build code stripping set it to minimal