As a test, when I sign into my AOL account (at the two factor authentication step), I choose to receive a code through WhatsApp. Here is the thing : on the iPhone app, I receive the code without problem.
However, if I check WhatsApp on a computer at the address web.whatsapp.com, the code is not received. This happens all the time.
I don't know if it is an AOL bug or if the fault lies with the web version of WhatsApp .