Merge branch 'errcode' of github.com:OpenIMSDK/Open-IM-Server into errcode

pkg/common/db/controller/msg.go

@@ -407,7 +407,7 @@ func (db *commonMsgDatabase) findMsgInfoBySeq(ctx context.Context, userID, docID
 	} else {
 		for _, seq := range seqs {
 			for i, msg := range msgs {
-				if seq == msg.Msg.Seq {
+				if msg.Msg != nil && seq == msg.Msg.Seq {
 					break
 				}
 				if i == len(msgs)-1 {

pkg/rpcclient/msg.go

@@ -176,7 +176,7 @@ func (s *NotificationSender) NotificationWithSesstionType(ctx context.Context, s
 	msg.Content = content
 	msg.MsgFrom = constant.SysMsgType
 	msg.ContentType = contentType
-	msg.SessionType = s.sessionTypeConf[contentType]
+	msg.SessionType = sesstionType
 	if msg.SessionType == constant.SuperGroupChatType {
 		msg.GroupID = recvID
 	}