nRF24L01+ Problem

I'm following Robin2's guide to use the wifi modules with arduino but I'm having a problem with the master Simple one way transmission (simpletx.ino).
Is it normal to receive an error every package sent?

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My module nRF24L01 + is equipped with an antenna, and I have nothing else connected to the Arduino.
What could be the problem ?

Thanks to Happy Holidays to all

I think I have solved... huh

Margarina:
I'm following Robin2's guide to use the wifi modules with arduino

To avoid confusion for other readers, my Simple nRF24L01+ Tutorial has nothing to do with WiFi. nRF24 modules do not use WiFi.

...R

I meant .... wireless. My fault