Indeed I think the issue is in the authenticator app.
When I open it my business account is grey and I can't do anything.
Every app i want to open from Microsoft (admin page or outlook for example) he asks confirmation with authenticator app but there i can't do anything.
Also when I choose to confirm with another way for example with a code, it doesn't work and I already checked everything i found on the internet too check in order to receive the codes but still nothing.
In attatchment a picture of what I see in the authenticator app with the grey business account. For your information, i have a basic business license.