PlatformNotSupportedException with Json.NET (newtonsoft)

Hello
I use JSON serialization by JsonConvert.SerializeObject of Json.NET
And it works in Unity editor game emulation, but didn't work on build not for Windows 10, not for Ubuntu 18.04
In log i see:
PlatformNotSupportedException: Operation is not supported on this platform....

What should i do to pass this problem?

 

SOLUTION:
edit->project settings->player->other settings->API compability level: from .NET 2.0 to .NET 4.x

 

Is there anything like json.net that would be compatible with net standard 2.0 ? Thanks it solved the issue for me btw

 

Thank you!

 

God bless you

 

Not work in Unity 2021.2.6f1

 

And the same goes for Unity 2021.2.7f1 building for MacOS standalone with .Net Framework (4.x) results in ;

PlatformNotSupportedException: Operation is not supported on this platform.

(referring to NewtonSoft's use of System.Reflection.Emit.DynamicMethod..ctor)

 

I noticed;

An AOT platform cannot implement any of the methods in the System.Reflection.Emit namespace. The rest of System.Reflection is acceptable, as long as the compiler can infer that the code used via reflection needs to exist at runtime.​

on https://docs.unity3d.com/2021.2/Documentation/Manual/ScriptingRestrictions.html

MacOS with IL2CPP is an AOT platform.

 

Found my solution in using this version of NewtonSoft.JSON for Unity ; https://github.com/jilleJr/Newtonsoft.Json-for-Unity

 

I solved the problem by removing 3rd newtonsoft packages in the project, and added package by git url from https://github.com/jilleJr/Newtonsoft.Json-for-Unity