Soap Api is giving Java.Lang error

While running soap api i am getting the following error.
java.lang.NullPointerException
at org.apache.http.client.methods.HttpPost.(HttpPost.java:76)
at com.kms.katalon.core.webservice.common.SoapClient.send(SoapClient.java:193)
at com.kms.katalon.controller.WebServiceController.sendRequest(WebServiceController.java:121)
at com.kms.katalon.composer.webservice.parts.SoapServicePart$4.run(SoapServicePart.java:237)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)

Hi @shireen.wali1,
Can you share your request object (.rs) file? Please also send your error log, which you can find via Help > Error Log.