Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.genexus.Preferences.getProperty(java.lang.String, java.lang.String)' on a null object reference
    at com.genexus.specific.android.HttpClient.addSDHeaders(HttpClient.java:22)
    at com.genexus.internet.GXHttpClient.setHost(GXHttpClient.java:169)
    at com.genexus.internet.GXHttpClient.setURL(GXHttpClient.java:149)
    at com.genexus.internet.HttpClientManual.getURLValid(HttpClientManual.java:44)
    at com.genexus.internet.HttpClientManual.execute(HttpClientManual.java:84)
    at com.genexus.internet.HttpClient.execute(HttpClient.java:207)
    at com.genexus.android.core.externalobjects.HttpClientAPI.callStandardClassHttpClient(HttpClientAPI.java:326)
    at com.genexus.android.core.externalobjects.HttpClientAPI.lambda$new$22$com-genexus-android-core-externalobjects-HttpClientAPI(HttpClientAPI.java:242)
    at com.genexus.android.core.externalobjects.HttpClientAPI$$ExternalSyntheticLambda7.invoke(Unknown Source:2)
    at com.genexus.android.core.externalapi.ExternalApi.invokeMethod(ExternalApi.java:314)
    at com.genexus.android.core.externalapi.ExternalApi.execute(ExternalApi.java:103)
    at com.genexus.android.core.externalapi.ExternalApi.execute(ExternalApi.java:114)
    at com.genexus.android.core.base.metadata.expressions.MethodExpression.eval(MethodExpression.java:169)
    at com.genexus.android.core.actions.Action$ExpressionContext.eval(Action.java:508)
    at com.genexus.android.core.actions.Action.getParameterValue(Action.java:218)
    at com.genexus.android.core.actions.Action.getParameterValue(Action.java:185) 
    at com.genexus.android.core.actions.MethodCallAction.Do(MethodCallAction.java:48) 
    at com.genexus.android.core.actions.CompositeAction.Do(CompositeAction.java:136) 
    at com.genexus.android.core.actions.ActionExecution$2.doInBackground(ActionExecution.java:419) 
    at com.genexus.android.core.actions.ActionExecution$2.doInBackground(ActionExecution.java:408) 
    at com.genexus.android.core.utils.TaskRunner.lambda$executeOnExecutor$2(TaskRunner.java:23) 
    at com.genexus.android.core.utils.TaskRunner$$ExternalSyntheticLambda1.run(Unknown Source:2)