add string

pkg/app/process.go

@@ -481,7 +481,7 @@ func Unlock() error{
 		return err
 	}
 	if !reply.IsOk {
-		tlog.Error("unlock auth failed","err",reply.Msg)
+		tlog.Error("unlock auth failed","err",string(reply.Msg))
 	}
 	return nil
 }