Hi,
The first time you visit imcdb now you get an annoying cookie popup like on most of the sites, that's normal.
Cf screenshot below (I get it in French, as it is localized).
I tried to avoid that, but it seems that ad companies really require it now, as Google is enforcing that.
You can either just click "Accept" if you don't care, or click the other button and validate if you don't want ad cookies (that one is not too bad: you don't have to reject cookies one by one when you configure the options).