Why is WhatsApp API not working?

Question

.NET

Tried all builds from Nuget.
I do everything the right way.
But even at the registration stage, a problem arises - all requests to WhatsApp return null.
How to fix it?
A little off topic:
Anyone who uses the WhatsApp API, please respond, how are things going with the WhatsApp API now?
In the github, all the repositories on the topic have dried up since the 16th year.

Answer 1

Everything that I found on Nuget or Githab almost didn't work, because few people there follow Whatsapp updates. That is, a working library appeared, Whatsapp was updated and you can no longer work. It seems to me that this could be the issue.
As for the Whatsapp API market, there is a tendency for the official Whatsapp API to become more and more accessible and thus wants to force other solutions out of the market, because apparently there is no other way to fight them. .
The solutions I have personally worked with are RAPIWHA and the Chat API. Both are normal. The first foreign project and it is more expensive, the second from the CIS

Answer 2

I worked with him on php, yes the API was not updated. But when the code was ready, all accounts were banned, because. after authorization through my whatsapp code, I was constantly banned for something, so I spat on this matter.