When you add a new account in to Expandi, it's sometimes needed to enter the PIN.
PIN - personal identification number.
It is a code that LinkedIn sends to your email address or phone number to verify that you logged in (and not someone else) with your LinkedIn Account in Expandi. You can enter your PIN in Expandi within 10 minutes from the time you received it.
When you add your LinkedIn in to the system, an orange warning sign (like on the picture below) will appear at the top part of your screen next to your account name.
When you click on this sign, you will see the page on the picture below. There, another orange sign appears next to the LinkedIn account with the problem.
If you hover over it, you will see the exact problem there is with your account. Clicking on it will lead you to another page in Expandi where you can solve it - in this case, where you can insert the PIN.
When you click on it, you'll see the screen below, fill in the PIN and your good to go!