Well…I have finally been able to link the printer to my account. I think it is a problem with my company router.
I tried to bind the printer using the company’s WiFi, and although the printer connected well to the WiFi and the tests were good, it did not show the QR code.
I used my mobile phone like a hotspot to the company’s WiFi and I connected the printer to that WiFi and the printer did not show the QR code either.
Finally I created a WiFi with my mobile phone from my mobile provider, I connected the printer to that WiFi and FINALLY then the printer did show the QR code.
I hope it’s helpful to someone.