Sometimes Instagram will require you to input a captcha in order to continue activity on your account.
If this happens, we will note it in your account interface.
To enter the captcha, you just need to login to your account via phone or tablet. Once you log in, you will be prompted to enter a simple captcha (a series of numbers and letters).
If you cannot see the captcha, or you accidently clicked cancel, then you can just try to like any post and the captcha box should reappear.