Sign in to teams?

I have a question about Microsoft Teams.

And although I have online lessons from tomorrow and the password I got does not work on my laptop. On my phone, however, I need a bigger screen.

what can I do?

Maybe Caps Lock? Or wrong email address?

It can't be that it works with the same password on your mobile phone, but not on the laptop

There's another reason

And what a reason could that be