java.lang.IllegalArgumentException: The content cannot be null

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    • java.lang.IllegalArgumentException: The content cannot be null at org.apache.commons.httpclient.methods.StringRequestEntity.<init>(StringRequestEntity.java:93) at com.gargoylesoftware.htmlunit.HttpWebConnection.makeHttpMethod(HttpWebConnection.java:255) at com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse(HttpWebConnection.java:97)
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