android 2.x版本。Caused by: java.lang.IllegalStateException: Please login first!

见下图

 

我客户端登录之后就调用环信的登录代码。根据代码逻辑是应该是没有登录成功，然后执行下面的代码就崩溃了
EMConversation mEmConversation = EMChatManager .getInstance() .getConversationByType( mCurrentVideo.getImuser() == null ? mImUser : mCurrentVideo.getImuser(), EMConversation.EMConversationType.Chat)