aws-logging-dotnet: NLog not sending logs to CloudWatch

NLog not sending logs to CloudWatch

Target frameword <TargetFramework>netcoreapp1.0</TargetFramework>

Packages

<PackageReference Include="AWS.Logger.Core" Version="1.1.4" />
<PackageReference Include="AWS.Logger.NLog" Version="1.1.4" />
<PackageReference Include="NLog" Version="5.0.0-beta07" />
<PackageReference Include="Amazon.Lambda.Core" Version="1.0.0" />
<PackageReference Include="Amazon.Lambda.Logging.AspNetCore" Version="1.1.0" />
<PackageReference Include="Amazon.Lambda.Serialization.Json" Version="1.1.0" />
<PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="1.0.1" />
...

NLog.config

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      throwExceptions="true"
      internalLogToConsole="true"
      internalLogLevel="Trace">
  <extensions> <add assembly="NLog.AWS.Logger" /> </extensions>
  <targets>
    
    <target name="awsout" type="AWSTarget" logGroup="critical-errors" region="eu-central-1"> 
      <layout xsi:type="JsonLayout" includeAllProperties="true"> 
        <attribute name="time" layout="${longdate}" /> 
        <attribute name="level" layout="${level:upperCase=true}"/> 
        <attribute name="message" layout="${message}" encode="false" /> 
        <attribute name="stack-trace" layout="${stacktrace:format=Raw:topFrames=5}"/> 
      </layout> 
    </target>
    </targets>
  <rules>
    <logger name="CriticalErrors" minlevel="Info" writeTo="awsout" />
  </rules>
</nlog>

Code

Logger Logger = LogManager.GetLogger("CriticalErrors");
Logger.Error(() => JsonConvert.SerializeObject(new Dictionary<string, object>
            {
                {"UNKNOWN-ERROR", internalError.GetLogCode()},
                {"ERROR-TYPE", "UNKNOWN"},
                {"PAYLOAD", stackTrace}
            }));

What am I doing wrong?