.NET Core 5 RawRabbit Serializer/Dependency Injection Issue

I have microservice based on .NET Core 2.2. I am using RawRabbit (version 2.0.0-beta9) as the service bus. The following packages were installed with it:

<PackageReference Include="RawRabbit" Version="2.0.0-beta9" />
<PackageReference Include="RawRabbit.DependencyInjection.ServiceCollection" Version="2.0.0-beta9" />
<PackageReference Include="RawRabbit.Operations.Publish" Version="2.0.0-beta9" />
<PackageReference Include="RawRabbit.Operations.Subscribe" Version="2.0.0-beta9" />

This is what my controller looks like:

 private readonly IBusClient _busClient;

//...constructor that inits the _busClient

[HttpPost("")]
public async Task<IActionResult> Post([FromBody] CreateActivity model)
{
    model.Id = Guid.NewGuid();
    await _busClient.PublishAsync(model); //Exception thrown here
    return Accepted($"Activities/{model.Name}");
}

The problem occurs when the code tries to do the following:

await _busClient.PublishAsync(model);

The exception I get is:

Method not found: 'Void Newtonsoft.Json.JsonSerializer.set_TypeNameAssemblyFormat(System.Runtime.Serialization.Formatters.FormatterAssemblyStyle)'.