Instagram: Help us confirm that this is your account?

When I want to log in to Instagram, I always get the message "Help us confirm that this is your account".

No matter where (cell phone, tablet, laptop) I register or what I do, this message always appears.

With my second account I can still log in without any problems.

So far I have been able to find out that this is a common mistake, but I could not find a solution anywhere.

Did any of you have the same problem and could somehow solve it? Or has it just disappeared?

Are you on http://www.instagram.com/...tagram.com

or on another side?

I tried it on this page and with the app. Is there another side?