Appian RPA trying to upload an excel file from my PC to Appian (PC as resource)

Hi ,

I am trying to upload an excel file from my local desktop to Appian folder. 

I am using upload document action from Appian RPA. I am able to locate the file and get file properties but facing null pointer issue when trying to upload the file to Appian folder. Please refer to the execution log below. Any insights on this would be helpful. 

[WARN] 2023-03-09 19:19:40 - - Method manageException invoked
[ERROR] 2023-03-09 19:19:40 - - java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
    at java.base/java.lang.reflect.Method.invoke(Method.java:577)
    at com.novayre.jidoka.client.RobotClientExecutor.invokeMethod(RobotClientExecutor.java:1546)
    at com.novayre.jidoka.client.RobotClientExecutor.onManageExceptionMethodCall(RobotClientExecutor.java:778)
    at com.novayre.jidoka.client.WorkflowProcessor.invokeManageExceptionMethod(WorkflowProcessor.java:202)
    at com.novayre.jidoka.client.WorkflowProcessor.manageException(WorkflowProcessor.java:239)
    at com.novayre.jidoka.client.WorkflowProcessor.start(WorkflowProcessor.java:150)
    at com.novayre.jidoka.client.RobotClientExecutor.workflow(RobotClientExecutor.java:734)
    at com.novayre.jidoka.client.RobotClientExecutor.runJavaTechnologyRobot(RobotClientExecutor.java:640)
    at com.novayre.jidoka.client.ETechnologyClient.runJava(ETechnologyClient.java:241)
    at com.novayre.jidoka.client.ETechnologyClient.lambda$static$1(ETechnologyClient.java:37)
    at com.novayre.jidoka.client.ETechnologyClient.run(ETechnologyClient.java:96)
    at com.novayre.jidoka.client.RobotClientExecutor.tryExecute(RobotClientExecutor.java:414)
    at com.novayre.jidoka.client.RobotClientExecutor.execute(RobotClientExecutor.java:214)
    at com.novayre.jidoka.client.ResponseHandler.execute(ResponseHandler.java:324)
    at com.novayre.jidoka.client.ResponseHandler.robotDeclaredResponse(ResponseHandler.java:274)
    at com.novayre.jidoka.client.ResponseHandler.onMessage(ResponseHandler.java:149)
    at com.novayre.jidoka.client.ClientManager.processResponse(ClientManager.java:1715)
    at com.novayre.jidoka.client.ClientManager.internalSendCommandRetry(ClientManager.java:1417)
    at com.novayre.jidoka.client.ClientManager.internalSendCommand(ClientManager.java:1283)
    at com.novayre.jidoka.client.ClientManager.sendCommand(ClientManager.java:1064)
    at com.novayre.jidoka.client.ClientManager.sendCommand(ClientManager.java:1053)
    at com.novayre.jidoka.client.ClientManager.loop(ClientManager.java:1044)
    at com.novayre.jidoka.client.ClientManager.realConnectToServer(ClientManager.java:926)
    at com.novayre.jidoka.client.ClientManager.connectToServer(ClientManager.java:884)
    at com.novayre.jidoka.client.JidokaClient.connect(JidokaClient.java:976)
    at com.novayre.jidoka.client.JidokaClient.mainLoop(JidokaClient.java:578)
    at com.novayre.jidoka.client.JidokaClient.run(JidokaClient.java:564)
    at com.novayre.jidoka.client.JidokaClient.main(JidokaClient.java:403)
Caused by: com.novayre.jidoka.client.api.exceptions.JidokaException: Error invoking method 'appian->uploadDocument'
    at com.novayre.jidoka.client.RobotClientExecutor.invokeMethod(RobotClientExecutor.java:1303)
    at com.novayre.jidoka.client.RobotClientExecutor.internalCallAction(RobotClientExecutor.java:911)
    at com.novayre.jidoka.client.RobotClientExecutor.onMethodCall(RobotClientExecutor.java:766)
    at com.novayre.jidoka.client.WorkflowProcessor.start(WorkflowProcessor.java:139)
    ... 22 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:116)
    at java.base/java.lang.reflect.Method.invoke(Method.java:577)
    at com.novayre.jidoka.client.SDKInvoker.invoke(SDKInvoker.java:56)
    at com.novayre.jidoka.client.RobotClientExecutor.internalInvokeMethod(RobotClientExecutor.java:1332)
    at com.novayre.jidoka.client.RobotClientExecutor.invokeMethod(RobotClientExecutor.java:1286)
    ... 25 more
Caused by: java.lang.NullPointerException
    at java.base/java.io.File.<init>(File.java:278)
    at com.novayre.jidoka.client.impl.appian.Appian.uploadDocument(Appian.java:289)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
    ... 29 more